function square_sheet(series, number, scheme, n_edge, e_edge, s_edge, w_edge, sheet_name, sheet_url) {
	this.sheet_series = series;
	this.sheet_number = number;
	this.scheme = scheme;
	this.n_edge=n_edge;
	this.e_edge=e_edge;
	this.s_edge=s_edge;
	this.w_edge=w_edge;
	this.sheet_name = sheet_name;
	this.sheet_url = sheet_url;
	this.is_place_on_square_sheet=is_place_on_square_sheet;
}

function unsquare_sheet(series, number, scheme, x1, y1, x2, y2, x3, y3, x4, y4, sheet_name, sheet_url) {
	this.sheet_series = series;
	this.sheet_number = number;
	this.scheme = scheme;
	this.x1 = x1;
	this.x2 = x2;
	this.x3 = x3;
	this.x4 = x4;
	this.y1 = y1;
	this.y2 = y2;
	this.y3 = y3;
	this.y4 = y4;
	this.sheet_name = sheet_name;
	this.sheet_url = sheet_url;
	this.is_place_on_unsquare_sheet=is_place_on_unsquare_sheet;
}
	
function is_place_on_square_sheet(eastings, northings) {
	if (eastings>this.w_edge) {
		if (eastings<this.e_edge) {
			if (northings>this.s_edge) {
				if (northings<this.n_edge) {
					return true;
				}
			}
		}
	}
	return false;
}

function is_place_on_unsquare_sheet(eastings, northings) {
	//western edge x = my+c
	var m = (this.x1-this.x4)/(this.y1-this.y4)
	var c = this.x1-(m*this.y1)
	if (eastings<((northings*m)+c)) {
		return false
	} else {
		//northern edge y = mx+c
		m = (this.y1-this.y2)/(this.x1-this.x2)
		c = this.y1-(m*this.x1)
		if (northings>((m*eastings)+c)) {
			return false
		} else {
			//eastern edge x = my+c
			m = (this.x2-this.x3)/(this.y2-this.y3)
			c = this.x2-(m*this.y2)
			if (eastings>((northings*m)+c)) {
				return false
			} else {
				//southern edge y = mx+c
				m = (this.y3-this.y4)/(this.x3-this.x4)
				c = this.y3-(m*this.x3)
				if (northings<((m*eastings)+c)) {
					return false
				} else {
					return true
				}
			}
		}
	}
}

function series(series_number, series_name) {
	this.series_number = series_number;
	this.series_name = series_name;
}

function series_name_by_number(in_number) {
	for (eachSeries in map_series) {
		if (map_series[eachSeries].series_number == in_number) {
			return map_series[eachSeries].series_name;
		}
	}
	return "Unknown Series";
}

var square_sheets = new Array;
var unsquare_sheets = new Array;
var map_series = new Array;

map_series = [
	new series( 1, "One Inch Old Series (England & Wales)"),
	new series( 2, "One Inch New Series and 3rd Edition Small Sheet Series (England & Wales)"),
	new series( 3, "One Inch 3rd Edition Large Sheet Series (England & Wales)"),
	new series( 4, "One Inch Popular Edition (England & Wales)"),
	new series( 12, "One Inch 5th Edition Small Sheet Series (England & Wales)"),
	new series( 13, "One Inch 5th Edition Large Sheet Series (England & Wales)"),
	new series( 5, "One Inch New Popular Edition (England & Wales)"),
	new series( 6, "One Inch Map of Scotland (1st Edition)"),
	new series( 15, "One Inch Map of Scotland (2nd Edition)"),
	new series( 16, "One Inch Map of Scotland (3rd Edition)"),
	new series( 7, "One Inch Popular Edition (Scotland)"),
	new series( 8, "One Inch 7th Series"),
	new series( 9, "1:50,000 Landranger"),
	new series(10, "One Inch Map of Ireland (1st, 2nd, 3rd Editions)"),
	new series(11, "1:50,000 OSI Discovery"),
	new series(14, "1:50,000 OSNI Discoverer"),
	];

unsquare_sheets = [

    new unsquare_sheet(1,1,1,532.5,209,589.4,210.4,590.3,173.1,533.7,171.5,''),
    new unsquare_sheet(1,2,1,589.4,210.4,646.2,212.2,646.9,174.7,590.3,173.1,''),
    new unsquare_sheet(1,3,1,590.3,173.1,646.9,174.7,648.1,137,591.4,135.5,''),
    new unsquare_sheet(1,4,1,591.4,135.5,648.1,137,649.5,98,595.5,97.4,''),
    new unsquare_sheet(1,5,1,534.7,134,591.4,135.5,595.5,97.4,535.5,96.8,''),
    new unsquare_sheet(1,6,1,533.7,171.5,590.3,173.1,591.4,135.5,534.7,134,''),
    new unsquare_sheet(1,7,1,475.9,207.5,532.5,209,533.7,171.5,476.7,170.2,''),
    new unsquare_sheet(1,8,1,476.7,170.2,533.7,171.5,534.7,134,478.1,132.7,''),
    new unsquare_sheet(1,9,1,478.1,132.7,534.7,134,535.5,96.8,478.7,96.2,''),
    new unsquare_sheet(1,10,1,418.4,105.1,474.6,107.3,477.6,69.8,421.4,67.6,''),
    new unsquare_sheet(1,11,1,430.3,131.7,478.1,132.7,478.7,96.2,431.5,94.6,''),
    new unsquare_sheet(1,12,1,429.3,169,476.7,170.2,478.1,132.7,430.3,131.7,''),
    new unsquare_sheet(1,13,1,428.4,206.7,475.9,207.5,476.7,170.2,429.3,169,''),
    new unsquare_sheet(1,14,1,383.8,169.3,429.3,169,430.3,131.7,383.7,131.8,''),
    new unsquare_sheet(1,15,1,383.7,131.8,430.3,131.7,431.5,94.6,383.8,94.3,''),
    new unsquare_sheet(1,16,1,383.8,94.3,431.5,94.6,432.7,56.9,383.9,56.8,''),
    new unsquare_sheet(1,17,1,336.3,94,383.8,94.3,383.9,56.8,336.2,56.5,''),
    new unsquare_sheet(1,18,1,336.4,131.5,383.7,131.8,383.8,94.3,336.3,94,''),
    new unsquare_sheet(1,19,1,337,169.2,383.8,169.3,383.7,131.8,336.4,131.5,''),
    new unsquare_sheet(1,20,1,279.9,169.9,337,169.2,336.4,131.5,279.1,132.1,''),
    new unsquare_sheet(1,21,1,279.1,132.1,336.4,131.5,336.3,94,279.1,94.2,''),
    new unsquare_sheet(1,22,1,279.1,94.2,336.3,94,336.2,56.5,278.4,56.9,''),
    new unsquare_sheet(1,23,1,278.4,56.9,336.2,56.5,336.1,20,277.7,20,''),
    new unsquare_sheet(1,24,1,221.5,57.6,278.4,56.9,277.7,20,221.2,19.8,''),
    new unsquare_sheet(1,25,1,222,95.3,279.1,94.2,278.4,56.9,221.5,57.6,''),
    new unsquare_sheet(1,26,1,222.6,132.9,279.1,132.1,279.1,94.2,222,95.3,''),
    new unsquare_sheet(1,27,1,222.8,170.6,279.9,169.9,279.1,132.1,222.6,132.9,''),
    new unsquare_sheet(1,28,1,165.7,171.3,222.8,170.6,222.6,132.9,164.9,133.6,''),
    new unsquare_sheet(1,29,1,164.9,133.6,222.6,132.9,222,95.3,164.9,96.1,''),
    new unsquare_sheet(1,30,1,164.9,96.1,222,95.3,221.5,57.6,164.6,58.3,''),
    new unsquare_sheet(1,31,1,164.6,58.3,221.5,57.6,221.2,19.8,164.3,21.1,''),
    new unsquare_sheet(1,32,1,164.3,21.1,221.2,19.8,110.8,-14.6,164,-14.4,''),
    new unsquare_sheet(1,33,1,107.7,59,164.6,58.3,164.3,21.1,106.8,21.5,''),
    new unsquare_sheet(1,34,1,384,206.6,428.4,206.7,429.3,169,383.8,169.3,''),
    new unsquare_sheet(1,35,1,337.2,206.6,384,206.6,383.8,169.3,337,169.2,''),
    new unsquare_sheet(1,36,1,280.5,207.1,337.2,206.6,337,169.2,279.9,169.9,''),
    new unsquare_sheet(1,37,1,224.4,207.4,280.5,207.1,279.9,169.9,222.8,170.6,''),
    new unsquare_sheet(1,38,1,168.3,207.5,224.4,207.4,222.8,170.6,165.7,171.3,''),
    new unsquare_sheet(1,39,1,138.7,245.8,169.5,245.5,168.3,207.5,121.2,207.6,''),
    new unsquare_sheet(1,40,1,169.5,245.5,224.2,245,224.4,207.4,168.3,207.5,''),
    new unsquare_sheet(1,41,1,224.2,245,280.9,244.5,280.5,207.1,224.4,207.4,''),
    new unsquare_sheet(1,42,1,280.9,244.5,337.6,244.2,337.2,206.6,280.5,207.1,''),
    new unsquare_sheet(1,43,1,337.6,244.2,384,244.2,384,206.6,337.2,206.6,''),
    new unsquare_sheet(1,44,1,384,244.2,427.9,244.3,428.4,206.7,384,206.6,''),
    new unsquare_sheet(1,45,1,427.9,244.3,474.9,244.7,475.9,207.5,428.4,206.7,''),
    new unsquare_sheet(1,46,1,474.9,244.7,531.7,246.3,532.5,209,475.9,207.5,''),
    new unsquare_sheet(1,47,1,531.7,246.3,588.3,248,589.4,210.4,532.5,209,''),
    new unsquare_sheet(1,48,1,588.3,248,645.2,249.4,646.2,212.2,589.4,210.4,''),
    new unsquare_sheet(1,49,1,644.3,286.7,672.6,287.5,673.6,250.1,645.2,249.4,''),
    new unsquare_sheet(1,50,1,587.4,285.2,644.3,286.7,645.2,249.4,588.3,248,''),
    new unsquare_sheet(1,51,1,530.3,282.6,587.4,285.2,588.3,248,531.7,246.3,''),
    new unsquare_sheet(1,52,1,473.9,282.1,530.3,282.6,531.7,246.3,474.9,244.7,''),
    new unsquare_sheet(1,53,1,426.9,281.6,473.9,282.1,474.9,244.7,427.9,244.3,''),
    new unsquare_sheet(1,54,1,384.3,281.7,426.9,281.6,427.9,244.3,384,244.2,''),
    new unsquare_sheet(1,55,1,337.8,281.6,384.3,281.7,384,244.2,337.6,244.2,''),
    new unsquare_sheet(1,56,1,281.2,282.2,337.8,281.6,337.6,244.2,280.9,244.5,''),
    new unsquare_sheet(1,57,1,224.7,282.5,281.2,282.2,280.9,244.5,224.2,245,''),
    new unsquare_sheet(1,58,1,168,282.4,224.7,282.5,224.2,245,169.5,245.5,''),
    new unsquare_sheet(1,59,1,224.8,320.1,281.5,319.5,281.2,282.2,224.7,282.5,''),
    new unsquare_sheet(1,60,1,281.5,319.5,338.3,319,337.8,281.6,281.2,282.2,''),
    new unsquare_sheet(1,61,1,338.3,319,383.8,319,384.3,281.7,337.8,281.6,''),
    new unsquare_sheet(1,62,1,383.8,319,426.7,319.2,530.3,282.6,384.3,281.7,''),
    new unsquare_sheet(1,63,1,426.7,319.2,472.7,319.6,473.9,282.1,426.9,281.6,''),
    new unsquare_sheet(1,64,1,472.7,319.6,529.6,320.9,530.3,282.6,473.9,282.1,''),
    new unsquare_sheet(1,65,1,529.6,320.9,586.5,322.7,587.4,285.2,530.3,282.6,''),
    new unsquare_sheet(1,66,1,586.5,322.7,643.3,324.1,644.3,286.7,587.4,285.2,''),
    new unsquare_sheet(1,67,1,643.3,324.1,670.7,325,672.6,287.5,644.3,286.7,''),
    new unsquare_sheet(1,68,1,585,360.1,670.7,362.5,670.7,325,586.5,322.7,''),
    new unsquare_sheet(1,69,1,528.5,358.5,585,360.1,586.5,322.7,529.6,320.9,''),
    new unsquare_sheet(1,70,1,471.8,356.9,528.5,358.5,529.6,320.9,472.7,319.6,''),
    new unsquare_sheet(1,71,1,426.6,356.6,471.8,356.9,472.7,319.6,426.7,319.2,''),
    new unsquare_sheet(1,72,1,383.6,356.5,426.6,356.6,426.7,319.2,383.8,319,''),
    new unsquare_sheet(1,73,1,338.5,356,383.6,356.5,383.8,319,338.3,319,''),
    new unsquare_sheet(1,74,1,281.8,356.9,338.5,356,338.3,319,281.5,319.5,''),
    new unsquare_sheet(1,75,1,225.2,357.5,281.8,356.9,281.5,319.5,224.8,320.1,''),
    new unsquare_sheet(1,76,1,196.9,357.8,225.2,357.5,224.8,320.1,196.4,320.4,''),
    new unsquare_sheet(1,77,1,196.2,395,225.5,395.4,225.2,357.5,196.9,357.8,''),
    new unsquare_sheet(1,78,1,225.5,395.4,282.8,394.5,281.8,356.9,225.2,357.5,''),
    new unsquare_sheet(1,79,1,282.8,394.5,339,395.3,338.5,356,281.8,356.9,''),
    new unsquare_sheet(1,80,1,339,395.3,383,395,383.6,356.5,338.5,356,''),
    new unsquare_sheet(1,81,1,383,395,426.3,394.7,426.6,356.6,383.6,356.5,''),
    new unsquare_sheet(1,82,1,426.3,394.7,470.8,394.3,471.8,356.9,426.6,356.6,''),
    new unsquare_sheet(1,83,1,470.8,394.3,527.6,395.9,528.5,358.5,471.8,356.9,''),
    new unsquare_sheet(1,84,1,527.6,395.9,584,397.5,585,360.1,528.5,358.5,''),
    new unsquare_sheet(1,85,1,526.5,433.4,560,440,584,397.5,527.6,395.9,''),
    new unsquare_sheet(1,86,1,469.7,431.7,526.5,433.4,527.6,395.9,470.8,394.3,''),
    new unsquare_sheet(1,87,1,426.2,432,469.7,431.7,470.8,394.3,426.3,394.7,''),
    new unsquare_sheet(1,88,1,382.9,432.5,426.2,432,426.3,394.7,383,395,''),
    new unsquare_sheet(1,89,1,339.4,432.9,382.9,432.5,383,395,339,395.3,''),
    new unsquare_sheet(1,90,1,283.8,433.7,339.4,432.9,339,395.3,282.8,394.5,''),

];

square_sheets = [
// Defined as:
// function square_sheet(series, number, scheme, n_edge, e_edge, s_edge, w_edge, sheet_name) 

//	Series 1 One Inch Old Series
    new square_sheet(1,91,2,334060,43830,207340,-146250,''),
    new square_sheet(1,92,2,334060,233910,207340,43830,''),
    new square_sheet(1,93,2,334060,423990,207340,233910,''),
    new square_sheet(1,94,2,334060,614070,207340,423990,''),
    new square_sheet(1,95,2,460780,614070,334060,423990,''),
    new square_sheet(1,96,2,460780,423990,334060,233910,''),
    new square_sheet(1,97,2,460780,233910,334060,43830,''),
    new square_sheet(1,98,2,460780,43830,334060,-146250,''),
    new square_sheet(1,99,2,460780,-146250,334060,-241290,''),
    new square_sheet(1,100,2,460780,-336330,270700,-526410,''),
    new square_sheet(1,101,2,587500,-51210,460780,-241290,''),
    new square_sheet(1,102,2,587500,138870,460780,-51210,''),
    new square_sheet(1,103,2,587500,328950,460780,138870,''),
    new square_sheet(1,104,2,587500,519030,460780,328950,''),
    new square_sheet(1,105,2,714220,328950,587500,138870,''),
    new square_sheet(1,106,2,714220,138870,587500,-51210,''),
    new square_sheet(1,107,2,714220,-51210,587500,-241290,''),
    new square_sheet(1,108,2,840940,138870,714220,-51210,''),
    new square_sheet(1,109,2,840940,328950,714220,138870,''),
    new square_sheet(1,110,2,967660,233910,840940,43830,''),

//    Series 2 : One-Inch New Series and 3rd Edition Small Sheet Series (E&W)
    new square_sheet(2,1,2,967660,138870,904300,43830,'Norham'),
    new square_sheet(2,2,2,967660,233910,904300,138870,'Berwick upon Tweed'),
    new square_sheet(2,3,2,904300,138870,840940,43830,'Ford'),
    new square_sheet(2,4,2,904300,233910,840940,138870,'Holy Island'),
    new square_sheet(2,5,2,840940,138870,777580,43830,'The Cheviot'),
    new square_sheet(2,6,2,840940,233910,777580,138870,'Alnwick'),
    new square_sheet(2,7,2,777580,43830,714220,-51210,'Keilder Castle'),
    new square_sheet(2,8,2,777580,138870,714220,43830,'Elsdon'),
    new square_sheet(2,9,2,777580,233910,714220,138870,'Rothbury'),
    new square_sheet(2,10,2,777580,328950,714220,233910,'Newbiggin'),
    new square_sheet(2,11,2,714220,-51210,650860,-146250,'Longtown'),
    new square_sheet(2,12,2,714220,43830,650860,-51210,'Shopford'),
    new square_sheet(2,13,2,714220,138870,650860,43830,'Bellingham'),
    new square_sheet(2,14,2,714220,233910,650860,138870,'Morpeth'),
    new square_sheet(2,15,2,714220,328950,650860,233910,'Tynemouth'),
    new square_sheet(2,16,2,650860,-146250,587500,-241290,'Carlisle'),
    new square_sheet(2,17,2,650860,-51210,587500,-146250,'Carlisle'),
    new square_sheet(2,18,2,650860,43830,587500,-51210,'Brampton'),
    new square_sheet(2,19,2,650860,138870,587500,43830,'Hexham'),
    new square_sheet(2,20,2,650860,233910,587500,138870,'Newcastle upon Tyne'),
    new square_sheet(2,21,2,650860,328950,587500,233910,'Sunderland'),
    new square_sheet(2,22,2,587500,-146250,524140,-241290,'Maryport'),
    new square_sheet(2,23,2,587500,-51210,524140,-146250,'Cockermouth'),
    new square_sheet(2,24,2,587500,43830,524140,-51210,'Penrith'),
    new square_sheet(2,25,2,587500,138870,524140,43830,'Alston'),
    new square_sheet(2,26,2,587500,233910,524140,138870,'Wolsingham'),
    new square_sheet(2,27,2,587500,328950,524140,233910,'Durham'),
    new square_sheet(2,28,2,524140,-146250,460780,-241290,'Whitehaven'),
    new square_sheet(2,29,2,524140,-51210,460780,-146250,'Keswick'),
    new square_sheet(2,30,2,524140,43830,460780,-51210,'Appleby'),
    new square_sheet(2,31,2,524140,138870,460780,43830,'Brough under Stainmore'),
    new square_sheet(2,32,2,524140,233910,460780,138870,'Barnard Castle'),
    new square_sheet(2,33,2,524140,328950,460780,233910,'Stockton on Tees'),
    new square_sheet(2,34,2,524140,423990,460780,328950,'Guisborough'),
    new square_sheet(2,35,2,524140,519030,460780,423990,'Whitby'),
    new square_sheet(2,36,2,460780,-336330,397420,-431370,'Isle of Man'),
    new square_sheet(2,37,2,460780,-146250,397420,-241290,'Gosforth'),
    new square_sheet(2,38,2,460780,-51210,397420,-146250,'Ambleside'),
    new square_sheet(2,39,2,460780,43830,397420,-51210,'Kendal'),
    new square_sheet(2,40,2,460780,138870,397420,43830,'Kirkby Stephen'),
    new square_sheet(2,41,2,460780,233910,397420,138870,'Richmond'),
    new square_sheet(2,42,2,460780,328950,397420,233910,'Northallerton'),
    new square_sheet(2,43,2,460780,423990,397420,328950,'Egton'),
    new square_sheet(2,44,2,460780,519030,397420,423990,'Whitby'),
    new square_sheet(2,45,2,397420,-431370,334060,-526410,'Isle of Man'),
    new square_sheet(2,46,2,397420,-336330,334060,-431370,'Isle of Man'),
    new square_sheet(2,47,2,397420,-146250,334060,-241290,'Barrow in Furness'),
    new square_sheet(2,48,2,397420,-51210,334060,-146250,'Barrow in Furness'),
    new square_sheet(2,49,2,397420,43830,334060,-51210,'Kirkby Lonsdale'),
    new square_sheet(2,50,2,397420,138870,334060,43830,'Hawes'),
    new square_sheet(2,51,2,397420,233910,334060,138870,'Masham'),
    new square_sheet(2,52,2,397420,328950,334060,233910,'Ripon'),
    new square_sheet(2,53,2,397420,423990,334060,328950,'Pickering'),
    new square_sheet(2,54,2,397420,519030,334060,423990,'Scarborough'),
    new square_sheet(2,55,2,397420,614070,334060,519030,'Scarborough'),
    new square_sheet(2,56,2,334060,-431370,270700,-526410,'Isle of Man'),
    new square_sheet(2,57,2,334060,-336330,270700,-431370,'Isle of Man'),
    new square_sheet(2,58,2,334060,-51210,270700,-146250,'Barrow in Furness'),
    new square_sheet(2,59,2,334060,43830,270700,-51210,'Lancaster'),
    new square_sheet(2,60,2,334060,138870,270700,43830,'Settle'),
    new square_sheet(2,61,2,334060,233910,270700,138870,'Pateley Bridge'),
    new square_sheet(2,62,2,334060,328950,270700,233910,'Harrogate'),
    new square_sheet(2,63,2,334060,423990,270700,328950,'York'),
    new square_sheet(2,64,2,334060,519030,270700,423990,'Bridlington'),
    new square_sheet(2,65,2,334060,614070,270700,519030,'Bridlington'),
    new square_sheet(2,66,2,270700,-51210,207340,-146250,'Fleetwood'),
    new square_sheet(2,67,2,270700,43830,207340,-51210,'Fleetwood'),
    new square_sheet(2,68,2,270700,138870,207340,43830,'Clitheroe'),
    new square_sheet(2,69,2,270700,233910,207340,138870,'Bradford'),
    new square_sheet(2,70,2,270700,328950,207340,233910,'Leeds'),
    new square_sheet(2,71,2,270700,423990,207340,328950,'Selby'),
    new square_sheet(2,72,2,270700,519030,207340,423990,'Beverley'),
    new square_sheet(2,73,2,270700,614070,207340,519030,'Hornsea'),
    new square_sheet(2,74,2,207340,-51210,143980,-146250,'Southport'),
    new square_sheet(2,75,2,207340,43830,143980,-51210,'Preston'),
    new square_sheet(2,76,2,207340,138870,143980,43830,'Rochdale'),
    new square_sheet(2,77,2,207340,233910,143980,138870,'Huddersfield'),
    new square_sheet(2,78,2,207340,328950,143980,233910,'Wakefield'),
    new square_sheet(2,79,2,207340,423990,143980,328950,'Goole'),
    new square_sheet(2,80,2,207340,519030,143980,423990,'Kingston upon Hull'),
    new square_sheet(2,81,2,207340,614070,143980,519030,'Patrington'),
    new square_sheet(2,82,2,207340,709110,143980,614070,'Patrington'),
    new square_sheet(2,83,2,143980,-51210,80620,-146250,'Southport/Liverpool'),
    new square_sheet(2,84,2,143980,43830,80620,-51210,'Wigan'),
    new square_sheet(2,85,2,143980,138870,80620,43830,'Manchester'),
    new square_sheet(2,86,2,143980,233910,80620,138870,'Glossop'),
    new square_sheet(2,87,2,143980,328950,80620,233910,'Barnsley'),
    new square_sheet(2,88,2,143980,423990,80620,328950,'Doncaster'),
    new square_sheet(2,89,2,143980,519030,80620,423990,'Brigg'),
    new square_sheet(2,90,2,143980,614070,80620,519030,'Great Grimsby'),
    new square_sheet(2,91,2,143980,709110,80620,614070,'Great Grimsby'),
    new square_sheet(2,92,2,80620,-431370,17260,-526410,'Holyhead'),
    new square_sheet(2,93,2,80620,-336330,17260,-431370,'Holyhead'),
    new square_sheet(2,94,2,80620,-241290,17260,-336330,'Bangor'),
    new square_sheet(2,95,2,80620,-146250,17260,-241290,'Denbigh'),
    new square_sheet(2,96,2,80620,-51210,17260,-146250,'Liverpool'),
    new square_sheet(2,97,2,80620,43830,17260,-51210,'Runcorn'),
    new square_sheet(2,98,2,80620,138870,17260,43830,'Stockport'),
    new square_sheet(2,99,2,80620,233910,17260,138870,'Chapel en le Frith'),
    new square_sheet(2,100,2,80620,328950,17260,233910,'Sheffield'),
    new square_sheet(2,101,2,80620,423990,17260,328950,'East Retford'),
    new square_sheet(2,102,2,80620,519030,17260,423990,'Market Rasen'),
    new square_sheet(2,103,2,80620,614070,17260,519030,'Louth'),
    new square_sheet(2,104,2,80620,709110,17260,614070,'Louth'),
    new square_sheet(2,105,2,17260,-336330,-46100,-431370,'Carnarvon'),
    new square_sheet(2,106,2,17260,-241290,-46100,-336330,'Bangor'),
    new square_sheet(2,107,2,17260,-146250,-46100,-241290,'Denbigh'),
    new square_sheet(2,108,2,17260,-51210,-46100,-146250,'Flint'),
    new square_sheet(2,109,2,17260,43830,-46100,-51210,'Chester'),
    new square_sheet(2,110,2,17260,138870,-46100,43830,'Macclesfield'),
    new square_sheet(2,111,2,17260,233910,-46100,138870,'Buxton'),
    new square_sheet(2,112,2,17260,328950,-46100,233910,'Chesterfield'),
    new square_sheet(2,113,2,17260,423990,-46100,328950,'Ollerton'),
    new square_sheet(2,114,2,17260,519030,-46100,423990,'Lincoln'),
    new square_sheet(2,115,2,17260,614070,-46100,519030,'Horncastle'),
    new square_sheet(2,116,2,17260,709110,-46100,614070,'Skegness'),
    new square_sheet(2,117,2,-46100,-431370,-109460,-526410,'Pwllheli'),
    new square_sheet(2,118,2,-46100,-336330,-109460,-431370,'Carnarvon/Pwllheli'),
    new square_sheet(2,119,2,-46100,-241290,-109460,-336330,'Snowdon'),
    new square_sheet(2,120,2,-46100,-146250,-109460,-241290,'Corwen'),
    new square_sheet(2,121,2,-46100,-51210,-109460,-146250,'Wrexham'),
    new square_sheet(2,122,2,-46100,43830,-109460,-51210,'Nantwich'),
    new square_sheet(2,123,2,-46100,138870,-109460,43830,'Stoke upon Trent'),
    new square_sheet(2,124,2,-46100,233910,-109460,138870,'Ashbourne'),
    new square_sheet(2,125,2,-46100,328950,-109460,233910,'Derby'),
    new square_sheet(2,126,2,-46100,423990,-109460,328950,'Nottingham'),
    new square_sheet(2,127,2,-46100,519030,-109460,423990,'Grantham'),
    new square_sheet(2,128,2,-46100,614070,-109460,519030,'Boston'),
    new square_sheet(2,129,2,-46100,709110,-109460,614070,'Skegness / Kings Lynn'),
    new square_sheet(2,130,2,-46100,804150,-109460,709110,'Wells next the Sea'),
    new square_sheet(2,131,2,-46100,899190,-109460,804150,'Cromer'),
    new square_sheet(2,132,2,-46100,994230,-109460,899190,'North Walsham'),
    new square_sheet(2,133,2,-109460,-431370,-172820,-526410,'Pwllheli'),
    new square_sheet(2,134,2,-109460,-336330,-172820,-431370,'Pwllheli'),
    new square_sheet(2,135,2,-109460,-241290,-172820,-336330,'Harlech'),
    new square_sheet(2,136,2,-109460,-146250,-172820,-241290,'Bala'),
    new square_sheet(2,137,2,-109460,-51210,-172820,-146250,'Oswestry'),
    new square_sheet(2,138,2,-109460,43830,-172820,-51210,'Wem'),
    new square_sheet(2,139,2,-109460,138870,-172820,43830,'Stafford'),
    new square_sheet(2,140,2,-109460,233910,-172820,138870,'Burton upon Trent'),
    new square_sheet(2,141,2,-109460,328950,-172820,233910,'Loughborough'),
    new square_sheet(2,142,2,-109460,423990,-172820,328950,'Melton Mowbray'),
    new square_sheet(2,143,2,-109460,519030,-172820,423990,'Bourn'),
    new square_sheet(2,144,2,-109460,614070,-172820,519030,'Spalding'),
    new square_sheet(2,145,2,-109460,709110,-172820,614070,'Kings Lynn'),
    new square_sheet(2,146,2,-109460,804150,-172820,709110,'Wells next the Sea'),
    new square_sheet(2,147,2,-109460,899190,-172820,804150,'Cromer'),
    new square_sheet(2,148,2,-109460,994230,-172820,899190,'North Walsham'),
    new square_sheet(2,149,2,-172820,-241290,-236180,-336330,'Barmouth'),
    new square_sheet(2,150,2,-172820,-146250,-236180,-241290,'Dinas-Mawddwy'),
    new square_sheet(2,151,2,-172820,-51210,-236180,-146250,'Welshpool'),
    new square_sheet(2,152,2,-172820,43830,-236180,-51210,'Shrewsbury'),
    new square_sheet(2,153,2,-172820,138870,-236180,43830,'Wolverhampton'),
    new square_sheet(2,154,2,-172820,233910,-236180,138870,'Lichfield'),
    new square_sheet(2,155,2,-172820,328950,-236180,233910,'Atherstone'),
    new square_sheet(2,156,2,-172820,423990,-236180,328950,'Leicester'),
    new square_sheet(2,157,2,-172820,519030,-236180,423990,'Stamford'),
    new square_sheet(2,158,2,-172820,614070,-236180,519030,'Peterborough'),
    new square_sheet(2,159,2,-172820,709110,-236180,614070,'Wisbech'),
    new square_sheet(2,160,2,-172820,804150,-236180,709110,'Swaffham'),
    new square_sheet(2,161,2,-172820,899190,-236180,804150,'Norwich'),
    new square_sheet(2,162,2,-172820,994230,-236180,899190,'Great Yarmouth'),
    new square_sheet(2,163,2,-236180,-241290,-299540,-336330,'Aberystwyth'),
    new square_sheet(2,164,2,-236180,-146250,-299540,-241290,'Llanidloes'),
    new square_sheet(2,165,2,-236180,-51210,-299540,-146250,'Montgomery'),
    new square_sheet(2,166,2,-236180,43830,-299540,-51210,'Church Stretton'),
    new square_sheet(2,167,2,-236180,138870,-299540,43830,'Dudley'),
    new square_sheet(2,168,2,-236180,233910,-299540,138870,'Birmingham'),
    new square_sheet(2,169,2,-236180,328950,-299540,233910,'Coventry'),
    new square_sheet(2,170,2,-236180,423990,-299540,328950,'Market Harborough'),
    new square_sheet(2,171,2,-236180,519030,-299540,423990,'Kettering'),
    new square_sheet(2,172,2,-236180,614070,-299540,519030,'Ramsey'),
    new square_sheet(2,173,2,-236180,709110,-299540,614070,'Ely'),
    new square_sheet(2,174,2,-236180,804150,-299540,709110,'Thetford'),
    new square_sheet(2,175,2,-236180,899190,-299540,804150,'Diss'),
    new square_sheet(2,176,2,-236180,994230,-299540,899190,'Lowestoft'),
    new square_sheet(2,177,2,-299540,-336330,-362900,-431370,'Aberaeron'),
    new square_sheet(2,178,2,-299540,-241290,-362900,-336330,'Llanilar'),
    new square_sheet(2,179,2,-299540,-146250,-362900,-241290,'Rhyader'),
    new square_sheet(2,180,2,-299540,-51210,-362900,-146250,'Knighton'),
    new square_sheet(2,181,2,-299540,43830,-362900,-51210,'Ludlow'),
    new square_sheet(2,182,2,-299540,138870,-362900,43830,'Droitwich'),
    new square_sheet(2,183,2,-299540,233910,-362900,138870,'Redditch'),
    new square_sheet(2,184,2,-299540,328950,-362900,233910,'Warwick'),
    new square_sheet(2,185,2,-299540,423990,-362900,328950,'Northampton'),
    new square_sheet(2,186,2,-299540,519030,-362900,423990,'Wellingborough'),
    new square_sheet(2,187,2,-299540,614070,-362900,519030,'Huntingdon'),
    new square_sheet(2,188,2,-299540,709110,-362900,614070,'Cambridge'),
    new square_sheet(2,189,2,-299540,804150,-362900,709110,'Bury St Edmunds'),
    new square_sheet(2,190,2,-299540,899190,-362900,804150,'Eye'),
    new square_sheet(2,191,2,-299540,994230,-362900,899190,'Saxmundham'),
    new square_sheet(2,192,2,-362900,-526410,-426260,-621450,'St Davids'),
    new square_sheet(2,193,2,-362900,-431370,-426260,-526410,'Cardigan'),
    new square_sheet(2,194,2,-362900,-336330,-426260,-431370,'Aberaeron'),
    new square_sheet(2,195,2,-362900,-241290,-426260,-336330,'Lampeter'),
    new square_sheet(2,196,2,-362900,-146250,-426260,-241290,'Builth'),
    new square_sheet(2,197,2,-362900,-51210,-426260,-146250,'Hay'),
    new square_sheet(2,198,2,-362900,43830,-426260,-51210,'Hereford'),
    new square_sheet(2,199,2,-362900,138870,-426260,43830,'Worcester'),
    new square_sheet(2,200,2,-362900,233910,-426260,138870,'Stratford on Avon'),
    new square_sheet(2,201,2,-362900,328950,-426260,233910,'Banbury'),
    new square_sheet(2,202,2,-362900,423990,-426260,328950,'Towcester'),
    new square_sheet(2,203,2,-362900,519030,-426260,423990,'Bedford'),
    new square_sheet(2,204,2,-362900,614070,-426260,519030,'Biggleswade'),
    new square_sheet(2,205,2,-362900,709110,-426260,614070,'Saffron  Walden'),
    new square_sheet(2,206,2,-362900,804150,-426260,709110,'Sudbury'),
    new square_sheet(2,207,2,-362900,899190,-426260,804150,'Ipswich'),
    new square_sheet(2,208,2,-362900,994230,-426260,899190,'Woodbridge'),
    new square_sheet(2,209,2,-426260,-526410,-489620,-621450,'St Davids'),
    new square_sheet(2,210,2,-426260,-431370,-489620,-526410,'Cardigan'),
    new square_sheet(2,211,2,-426260,-336330,-489620,-431370,'Newcastle Emlyn'),
    new square_sheet(2,212,2,-426260,-241290,-489620,-336330,'Llandovery'),
    new square_sheet(2,213,2,-426260,-146250,-489620,-241290,'Brecon'),
    new square_sheet(2,214,2,-426260,-51210,-489620,-146250,'Talgarth'),
    new square_sheet(2,215,2,-426260,43830,-489620,-51210,'Ross'),
    new square_sheet(2,216,2,-426260,138870,-489620,43830,'Tewksbury'),
    new square_sheet(2,217,2,-426260,233910,-489620,138870,'Moreton in the Marsh'),
    new square_sheet(2,218,2,-426260,328950,-489620,233910,'Chipping Norton'),
    new square_sheet(2,219,2,-426260,423990,-489620,328950,'Buckingham'),
    new square_sheet(2,220,2,-426260,519030,-489620,423990,'Leighton Buzzard'),
    new square_sheet(2,221,2,-426260,614070,-489620,519030,'Hitchin'),
    new square_sheet(2,222,2,-426260,709110,-489620,614070,'Great Dunmow'),
    new square_sheet(2,223,2,-426260,804150,-489620,709110,'Braintree'),
    new square_sheet(2,224,2,-426260,899190,-489620,804150,'Colchester'),
    new square_sheet(2,225,2,-426260,994230,-489620,899190,'Colchester'),
    new square_sheet(2,226,2,-489620,-621450,-552980,-716490,'Milford'),
    new square_sheet(2,227,2,-489620,-526410,-552980,-621450,'Milford'),
    new square_sheet(2,228,2,-489620,-431370,-552980,-526410,'Pembroke'),
    new square_sheet(2,229,2,-489620,-336330,-552980,-431370,'Carmarthen'),
    new square_sheet(2,230,2,-489620,-241290,-552980,-336330,'Swansea'),
    new square_sheet(2,231,2,-489620,-146250,-552980,-241290,'Merthyr Tydfil'),
    new square_sheet(2,232,2,-489620,-51210,-552980,-146250,'Abergavenny'),
    new square_sheet(2,233,2,-489620,43830,-552980,-51210,'Monmouth'),
    new square_sheet(2,234,2,-489620,138870,-552980,43830,'Gloucester'),
    new square_sheet(2,235,2,-489620,233910,-552980,138870,'Cirencester'),
    new square_sheet(2,236,2,-489620,328950,-552980,233910,'Oxford'),
    new square_sheet(2,237,2,-489620,423990,-552980,328950,'Thame'),
    new square_sheet(2,238,2,-489620,519030,-552980,423990,'Aylesbury'),
    new square_sheet(2,239,2,-489620,614070,-552980,519030,'Hertford'),
    new square_sheet(2,240,2,-489620,709110,-552980,614070,'Epping'),
    new square_sheet(2,241,2,-489620,804150,-552980,709110,'Chelmsford'),
    new square_sheet(2,242,2,-489620,899190,-552980,804150,'Brightlingsea'),
    new square_sheet(2,244,2,-552980,-526410,-616340,-621450,'Milford'),
    new square_sheet(2,245,2,-552980,-431370,-616340,-526410,'Pembroke'),
    new square_sheet(2,246,2,-552980,-336330,-616340,-431370,'Carmarthen'),
    new square_sheet(2,247,2,-552980,-241290,-616340,-336330,'Swansea'),
    new square_sheet(2,248,2,-552980,-146250,-616340,-241290,'Pontypridd'),
    new square_sheet(2,249,2,-552980,-51210,-616340,-146250,'Newport'),
    new square_sheet(2,250,2,-552980,43830,-616340,-51210,'Chepstow'),
    new square_sheet(2,251,2,-552980,138870,-616340,43830,'Malmesbury'),
    new square_sheet(2,252,2,-552980,233910,-616340,138870,'Swindon'),
    new square_sheet(2,253,2,-552980,328950,-616340,233910,'Abingdon'),
    new square_sheet(2,254,2,-552980,423990,-616340,328950,'Henley on Thames'),
    new square_sheet(2,255,2,-552980,519030,-616340,423990,'Beaconsfield'),
    new square_sheet(2,256,2,-552980,614070,-616340,519030,'North London'),
    new square_sheet(2,257,2,-552980,709110,-616340,614070,'Romford'),
    new square_sheet(2,258,2,-552980,804150,-616340,709110,'Shoeburyness'),
    new square_sheet(2,259,2,-552980,899190,-616340,804150,'Foulness'),
    new square_sheet(2,261,2,-616340,-241290,-679700,-336330,'Pontypridd'),
    new square_sheet(2,262,2,-616340,-146250,-679700,-241290,'Pontypridd'),
    new square_sheet(2,263,2,-616340,-51210,-679700,-146250,'The Severn Estuary'),
    new square_sheet(2,264,2,-616340,43830,-679700,-51210,'Bristol'),
    new square_sheet(2,265,2,-616340,138870,-679700,43830,'Bath'),
    new square_sheet(2,266,2,-616340,233910,-679700,138870,'Marlborough'),
    new square_sheet(2,267,2,-616340,328950,-679700,233910,'Hungerford'),
    new square_sheet(2,268,2,-616340,423990,-679700,328950,'Reading'),
    new square_sheet(2,269,2,-616340,519030,-679700,423990,'Windsor'),
    new square_sheet(2,270,2,-616340,614070,-679700,519030,'South London'),
    new square_sheet(2,271,2,-616340,709110,-679700,614070,'Dartford'),
    new square_sheet(2,272,2,-616340,804150,-679700,709110,'Chatham & Shoeburyness'),
    new square_sheet(2,273,2,-616340,899190,-679700,804150,'East Kent'),
    new square_sheet(2,274,2,-616340,994230,-679700,899190,'Margate'),
    new square_sheet(2,275,2,-679700,-431370,-743060,-526410,'Lundy Island'),
    new square_sheet(2,276,2,-679700,-336330,-743060,-431370,'Bideford'),
    new square_sheet(2,277,2,-679700,-241290,-743060,-336330,'Ilfracombe'),
    new square_sheet(2,278,2,-679700,-146250,-743060,-241290,'Minehead'),
    new square_sheet(2,279,2,-679700,-51210,-743060,-146250,'The Severn Estuary'),
    new square_sheet(2,280,2,-679700,43830,-743060,-51210,'Bristol'),
    new square_sheet(2,281,2,-679700,138870,-743060,43830,'Frome'),
    new square_sheet(2,282,2,-679700,233910,-743060,138870,'Salisbury Plain'),
    new square_sheet(2,283,2,-679700,328950,-743060,233910,'Andover'),
    new square_sheet(2,284,2,-679700,423990,-743060,328950,'Basingstoke'),
    new square_sheet(2,285,2,-679700,519030,-743060,423990,'Aldershot'),
    new square_sheet(2,286,2,-679700,614070,-743060,519030,'Reigate'),
    new square_sheet(2,287,2,-679700,709110,-743060,614070,'Sevenoaks'),
    new square_sheet(2,288,2,-679700,804150,-743060,709110,'Maidstone'),
    new square_sheet(2,289,2,-679700,899190,-743060,804150,'East Kent'),
    new square_sheet(2,290,2,-679700,994230,-743060,899190,'Margate'),
    new square_sheet(2,291,2,-743060,-431370,-806420,-526410,'Lundy Island'),
    new square_sheet(2,292,2,-743060,-336330,-806420,-431370,'Bideford'),
    new square_sheet(2,293,2,-743060,-241290,-806420,-336330,'Ilfracombe'),
    new square_sheet(2,294,2,-743060,-146250,-806420,-241290,'Minehead'),
    new square_sheet(2,295,2,-743060,-51210,-806420,-146250,'Bridgwater'),
    new square_sheet(2,296,2,-743060,43830,-806420,-51210,'Glastonbury'),
    new square_sheet(2,297,2,-743060,138870,-806420,43830,'Wincanton'),
    new square_sheet(2,298,2,-743060,233910,-806420,138870,'Salisbury Plain'),
    new square_sheet(2,299,2,-743060,328950,-806420,233910,'Winchester'),
    new square_sheet(2,300,2,-743060,423990,-806420,328950,'Alresford'),
    new square_sheet(2,301,2,-743060,519030,-806420,423990,'Haslemere'),
    new square_sheet(2,302,2,-743060,614070,-806420,519030,'Horsham'),
    new square_sheet(2,303,2,-743060,709110,-806420,614070,'Tunbridge Wells'),
    new square_sheet(2,304,2,-743060,804150,-806420,709110,'Tenterden'),
    new square_sheet(2,305,2,-743060,899190,-806420,804150,'Folkestone & Ashford'),
    new square_sheet(2,306,2,-743060,994230,-806420,899190,'Dover'),
    new square_sheet(2,307,2,-806420,-431370,-869780,-526410,'Bude'),
    new square_sheet(2,308,2,-806420,-336330,-869780,-431370,'Bude'),
    new square_sheet(2,309,2,-806420,-241290,-869780,-336330,'Chulmleigh'),
    new square_sheet(2,310,2,-806420,-146250,-869780,-241290,'Tiverton'),
    new square_sheet(2,311,2,-806420,-51210,-869780,-146250,'Wellington'),
    new square_sheet(2,312,2,-806420,43830,-869780,-51210,'Yeovil'),
    new square_sheet(2,313,2,-806420,138870,-869780,43830,'Shaftesbury'),
    new square_sheet(2,314,2,-806420,233910,-869780,138870,'Ringwood'),
    new square_sheet(2,315,2,-806420,328950,-869780,233910,'Southampton'),
    new square_sheet(2,316,2,-806420,423990,-869780,328950,'Fareham'),
    new square_sheet(2,317,2,-806420,519030,-869780,423990,'Chichester & Bognor'),
    new square_sheet(2,318,2,-806420,614070,-869780,519030,'Brighton & Worthing'),
    new square_sheet(2,319,2,-806420,709110,-869780,614070,'Eastbourne & Lewes'),
    new square_sheet(2,320,2,-806420,804150,-869780,709110,'Hastings'),
    new square_sheet(2,321,2,-806420,899190,-869780,804150,'Folkestone & Ashford'),
    new square_sheet(2,322,2,-869780,-431370,-933140,-526410,'Boscastle'),
    new square_sheet(2,323,2,-869780,-336330,-933140,-431370,'Holsworthy'),
    new square_sheet(2,324,2,-869780,-241290,-933140,-336330,'Dartmoor'),
    new square_sheet(2,325,2,-869780,-146250,-933140,-241290,'Exeter'),
    new square_sheet(2,326,2,-869780,-51210,-933140,-146250,'Sidmouth'),
    new square_sheet(2,327,2,-869780,43830,-933140,-51210,'Bridport'),
    new square_sheet(2,328,2,-869780,138870,-933140,43830,'Dorchester & Weymouth'),
    new square_sheet(2,329,2,-869780,233910,-933140,138870,'Bournemouth & Swanage'),
    new square_sheet(2,330,2,-869780,328950,-933140,233910,'The Solent'),
    new square_sheet(2,331,2,-869780,423990,-933140,328950,'Spithead'),
    new square_sheet(2,332,2,-869780,519030,-933140,423990,'Chichester & Bognor'),
    new square_sheet(2,333,2,-869780,614070,-933140,519030,'Brighton & Worthing'),
    new square_sheet(2,334,2,-869780,709110,-933140,614070,'Eastbourne & Lewes'),
    new square_sheet(2,335,2,-933140,-526410,-996500,-621450,'Newquay'),
    new square_sheet(2,336,2,-933140,-431370,-996500,-526410,'Boscastle'),
    new square_sheet(2,337,2,-933140,-336330,-996500,-431370,'Tavistock'),
    new square_sheet(2,338,2,-933140,-241290,-996500,-336330,'Dartmoor'),
    new square_sheet(2,339,2,-933140,-146250,-996500,-241290,'Exeter'),
    new square_sheet(2,340,2,-933140,-51210,-996500,-146250,'Sidmouth'),
    new square_sheet(2,341,2,-933140,43830,-996500,-51210,'Bridport'),
    new square_sheet(2,342,2,-933140,138870,-996500,43830,'Dorchester & Weymouth'),
    new square_sheet(2,343,2,-933140,233910,-996500,138870,'Bournemouth & Swanage'),
    new square_sheet(2,344,2,-933140,328950,-996500,233910,'The Solent'),
    new square_sheet(2,345,2,-933140,423990,-996500,328950,'Spithead'),
    new square_sheet(2,346,2,-996500,-526410,-1059860,-621450,'Newquay'),
    new square_sheet(2,347,2,-996500,-431370,-1059860,-526410,'Bodmin & St Austell'),
    new square_sheet(2,348,2,-996500,-336330,-1059860,-431370,'Plymouth'),
    new square_sheet(2,349,2,-996500,-241290,-1059860,-336330,'Ivybridge'),
    new square_sheet(2,350,2,-996500,-146250,-1059860,-241290,'Torquay'),
    new square_sheet(2,351,2,-1059860,-621450,-1123220,-716490,'Penzance'),
    new square_sheet(2,352,2,-1059860,-526410,-1123220,-621450,'Falmouth'),
    new square_sheet(2,353,2,-1059860,-431370,-1123220,-526410,'Bodmin & St Austell'),
    new square_sheet(2,354,2,-1059860,-336330,-1123220,-431370,'Plymouth'),
    new square_sheet(2,355,2,-1059860,-241290,-1123220,-336330,'Ivybridge'),
    new square_sheet(2,356,2,-1059860,-146250,-1123220,-336330,'Torquay'),
    new square_sheet(2,357,2,-1123220,-811530,-1186580,-906570,'Isles of Scilly'),
    new square_sheet(2,358,2,-1123220,-621450,-1186580,-716490,'Penzance'),
    new square_sheet(2,359,2,-1123220,-526410,-1186580,-621450,'Falmouth'),
    new square_sheet(2,360,2,-1186580,-811530,-1249940,-906570,'Isles of Scilly'),

//  Series 3 Third LSS
    new square_sheet(3,1,1,657,399,616,379,'River Tweed'),
    new square_sheet(3,2,1,657,427,616,399,'Holy Island'),
    new square_sheet(3,3,2,809260,138870,714220,-3690,'The Cheviots'),
    new square_sheet(3,4,2,809260,281430,714220,138870,'Rothbury'),
    new square_sheet(3,5,2,714220,-3690,619180,-146250,'Gretna'),
    new square_sheet(3,6,2,714220,138870,619180,-3690,'Hexham'),
    new square_sheet(3,7,2,714220,281430,619180,138870,'Newcastle upon Tyne'),
    new square_sheet(3,8,1,558,335,530,293,'Silloth and Cockermouth'),
    new square_sheet(3,9,2,619180,43830,524140,-98730,'Carlisle and Penrith'),
    new square_sheet(3,10,2,619180,186390,524140,43830,'Wear Dale'),
    new square_sheet(3,11,2,619180,328950,524140,186390,'Sunderland, Durham and Hartlepool'),
    new square_sheet(3,12,1,530,335,501,293,'Whitehaven and Keswick'),
    new square_sheet(3,13,2,524140,43830,429100,-98730,'Ullswater and Ambleside'),
    new square_sheet(3,14,2,524140,186390,429100,43830,'Barnard Castle and Kirkby Stephen'),
    new square_sheet(3,15,2,524140,328950,429100,186390,'Darlington and Middlesbrough'),
    new square_sheet(3,16,1,527,500,500,457,'Whitby and Saltburn'),
    new square_sheet(3,17,1,506,251,464,214,'Isle of Man'),
    new square_sheet(3,18,1,501,330,460,304,'Barrow in Furness and Coniston'),
    new square_sheet(3,19,2,429100,43830,334060,-98730,'Kendal'),
    new square_sheet(3,20,2,429100,186390,334060,43830,'Hawes and Leburn'),
    new square_sheet(3,21,2,429100,328950,334060,186390,'Northallerton and Ripon'),
    new square_sheet(3,22,2,429100,471510,334060,328950,'Pickering'),
    new square_sheet(3,23,1,500,527,470,485,'Scarborough and Flamborough Head'),
    new square_sheet(3,24,2,334060,43830,239020,-98730,'Lancaster and Fleetwood'),
    new square_sheet(3,25,2,334060,186390,239020,43830,'Skipton'),
    new square_sheet(3,26,2,334060,328950,239020,186390,'Harrogate'),
    new square_sheet(3,27,2,334060,471510,239020,328950,'York'),
    new square_sheet(3,28,1,470,524,441,484,'Gt  Driffield and Bridlington'),
    new square_sheet(3,29,2,239020,43830,143980,-98730,'Preston, Southport and Blackpool'),
    new square_sheet(3,30,2,239020,186390,143980,43830,'Accrington, Burnley and Halifax'),
    new square_sheet(3,31,2,239020,328950,143980,186390,'Bradford, Leeds and Wakefield'),
    new square_sheet(3,32,2,239020,471510,143980,328950,'Goole'),
    new square_sheet(3,33,2,239020,614070,143980,471510,'Hull'),
    new square_sheet(3,34,1,419,359,365,318,'Liverpool Southport and Chester'),
    new square_sheet(3,35,2,143980,91350,48940,-51210,'Bolton, Warrington and St Helens'),
    new square_sheet(3,36,2,143980,233910,48940,91350,'Manchester, Stockport and Oldham'),
    new square_sheet(3,37,2,143980,376470,48940,233910,'Sheffield,Barnsley and Doncaster'),
    new square_sheet(3,38,2,143980,519030,48940,376470,'Gainsborough'),
    new square_sheet(3,39,2,143980,661590,48940,519030,'Grimsby and Louth'),
    new square_sheet(3,40,1,396,261,367,219,'Anglesey'),
    new square_sheet(3,41,1,370,273,342,229,'Snowdon'),
    new square_sheet(3,42,2,48940,-193770,-46100,-336330,'Bangor, Llandudno and Colwyn Bay'),
    new square_sheet(3,43,2,48940,-51210,-46100,-193770,'Flint'),
    new square_sheet(3,44,2,48940,91350,-46100,-51210,'Chester and Northwich'),
    new square_sheet(3,45,2,48940,233910,-46100,91350,'Macclesfield, Buxton and Leek'),
    new square_sheet(3,46,2,48940,376470,-46100,233910,'Matlock, Chesterfield and Worksop'),
    new square_sheet(3,47,2,48940,519030,-46100,376470,'Lincoln'),
    new square_sheet(3,48,1,383,559,354,513,'Horncastle and Skegness'),
    new square_sheet(3,49,1,347,252,320,210,'Pwllheli'),
    new square_sheet(3,50,2,-46100,-193770,-141140,-336330,'Ffestiniog'),
    new square_sheet(3,51,2,-46100,-51210,-141140,-193770,'Llangollen, Oswestry and Wrexham'),
    new square_sheet(3,52,2,-46100,91350,-141140,-51210,'Crewe, Market Drayton and  Whitchurch'),
    new square_sheet(3,53,2,-46100,233910,-141140,91350,'Stoke upon Trent and Uttoxeter'),
    new square_sheet(3,54,2,-46100,376470,-141140,233910,'Nottingham and Derby'),
    new square_sheet(3,55,2,-46100,519030,-141140,376470,'Grantham'),
    new square_sheet(3,56,2,-46100,661590,-141140,519030,'Boston'),
    new square_sheet(3,57,2,-46100,804150,-141140,661590,'Hunstanton and Fakenham'),
    new square_sheet(3,58,2,-46100,946710,-141140,804150,'Cromer'),
    new square_sheet(3,59,2,-141140,-193770,-236180,-336330,'Barmouth'),
    new square_sheet(3,60,2,-141140,-51210,-236180,-193770,'Welshpool'),
    new square_sheet(3,61,2,-141140,91350,-236180,-51210,'Shrewsbury'),
    new square_sheet(3,62,2,-141140,233910,-236180,91350,'Cannock Chase'),
    new square_sheet(3,63,2,-141140,376470,-236180,233910,'Leicester'),
    new square_sheet(3,64,2,-141140,519030,-236180,376470,'Melton Mowbray, Oakham and Stamford'),
    new square_sheet(3,65,2,-141140,661590,-236180,519030,'Peterborough and Wisbech'),
    new square_sheet(3,66,2,-141140,804150,-236180,661590,'Kings Lynn and Swaffham'),
    new square_sheet(3,67,2,-141140,946710,-236180,804150,'Norwich'),
    new square_sheet(3,68,1,329,656,285,627,'Gt Yarmouth and Lowestoft'),
    new square_sheet(3,69,2,-236180,-193770,-331220,-336330,'Aberystwyth'),
    new square_sheet(3,70,2,-236180,-51210,-331220,-193770,'[Newtown]'),
    new square_sheet(3,71,2,-236180,91350,-331220,-51210,'Bridgnorth and Ludlow'),
    new square_sheet(3,72,2,-236180,233910,-331220,91350,'Birmingham'),
    new square_sheet(3,73,2,-236180,376470,-331220,233910,'Coventry and Rugby'),
    new square_sheet(3,74,2,-236180,519030,-331220,376470,'Kettering'),
    new square_sheet(3,75,2,-236180,661590,-331220,519030,'Ramsey'),
    new square_sheet(3,76,2,-236180,804150,-331220,661590,'Soham and Thetford'),
    new square_sheet(3,77,2,-236180,946710,-331220,804150,'Bungay, Harleston and Diss'),
    new square_sheet(3,78,2,-331220,-336330,-426260,-478890,'[Cardigan]'),
    new square_sheet(3,79,2,-331220,-193770,-426260,-336330,'Lampeter'),
    new square_sheet(3,80,2,-331220,-51210,-426260,-193770,'[New Radnor]'),
    new square_sheet(3,81,2,-331220,91350,-426260,-51210,'Leominster, Great Malvern and Bromyard'),
    new square_sheet(3,82,2,-331220,233910,-426260,91350,'Stratford on Avon and Worcester'),
    new square_sheet(3,83,2,-331220,376470,-426260,233910,'Warwick and Banbury'),
    new square_sheet(3,84,2,-331220,519030,-426260,376470,'Northampton and Bedford'),
    new square_sheet(3,85,2,-331220,661590,-426260,519030,'Cambridge and Royston'),
    new square_sheet(3,86,2,-331220,804150,-426260,661590,'Newmarket, Sudbury and Bury St Edmunds'),
    new square_sheet(3,87,2,-331220,946710,-426260,804150,'Ipswich'),
    new square_sheet(3,88,1,285,656,242,627,'Saxmundham'),
    new square_sheet(3,89,1,244,207,217,164,'Fishguard and St Davids'),
    new square_sheet(3,90,2,-426260,-336330,-521300,-478890,'Carmarthen'),
    new square_sheet(3,91,2,-426260,-193770,-521300,-336330,'Valley of Towy'),
    new square_sheet(3,92,2,-426260,-51210,-521300,-193770,'Brecon and  Abergavenny'),
    new square_sheet(3,93,2,-426260,91350,-521300,-51210,'Ross'),
    new square_sheet(3,94,2,-426260,233910,-521300,91350,'Gloucester and Cheltenham'),
    new square_sheet(3,95,2,-426260,376470,-521300,233910,'Chipping Norton, Woodstock and Bicester'),
    new square_sheet(3,96,2,-426260,519030,-521300,376470,'Buckingham, Leighton Buzzard and Luton'),
    new square_sheet(3,97,2,-426260,661590,-521300,519030,'Hertford'),
    new square_sheet(3,98,2,-426260,804150,-521300,661590,'Braintree'),
    new square_sheet(3,99,1,238,632,209,590,'Colchester and Harwich'),
    new square_sheet(3,100,1,217,221,190,170,'[Pembroke]'),
    new square_sheet(3,101,2,-521300,-288810,-616340,-431370,'[Llanelly]'),
    new square_sheet(3,102,2,-521300,-146250,-616340,-288810,'Swansea and Merthyr Tydfil'),
    new square_sheet(3,103,2,-521300,-3690,-616340,-146250,'Newport, Blaenavon and Pontypool'),
    new square_sheet(3,104,2,-521300,138870,-616340,-3690,'Dursley'),
    new square_sheet(3,105,2,-521300,281430,-616340,138870,'Swindon and Cirencester'),
    new square_sheet(3,106,2,-521300,423990,-616340,281430,'Oxford and Henley on Thames'),
    new square_sheet(3,107,2,-521300,566550,-616340,423990,'Watford and High Wycombe'),
    new square_sheet(3,108,2,-521300,709110,-616340,566550,'NE London and Epping Forest'),
    new square_sheet(3,109,1,209,606,180,564,'Shoeburyness'),
    new square_sheet(3,110,1,192,317,164,271,'Bridgend'),
    new square_sheet(3,111,2,-616340,-3690,-711380,-146250,'Cardiff and Weston super Mare'),
    new square_sheet(3,112,2,-616340,138870,-711380,-3690,'Bristol and Bath'),
    new square_sheet(3,113,2,-616340,281430,-711380,138870,'Marlborough'),
    new square_sheet(3,114,2,-616340,423990,-711380,281430,'Reading and Newbury'),
    new square_sheet(3,115,2,-616340,566550,-711380,423990,'Windsor and Richmond'),
    new square_sheet(3,116,2,-616340,709110,-711380,566550,'Croydon, Gravesend and Sevenoaks'),
    new square_sheet(3,117,2,-616340,851670,-711380,709110,'Chatham and Sheerness'),
    new square_sheet(3,118,1,175,641,144,597,'Canterbury and Margate'),
    new square_sheet(3,119,1,153,264,110,235,'Barnstaple'),
    new square_sheet(3,119,1,149,215,143,212,'Barnstaple'),
    new square_sheet(3,120,2,-711380,-146250,-806420,-288810,'Exmoor'),
    new square_sheet(3,121,2,-711380,-3690,-806420,-146250,'Bridgwater'),
    new square_sheet(3,122,2,-711380,138870,-806420,-3690,'Frome and Wincanton'),
    new square_sheet(3,123,2,-711380,281430,-806420,138870,'Salisbury and Stonehenge'),
    new square_sheet(3,124,2,-711380,423990,-806420,281430,'Winchester and Alton'),
    new square_sheet(3,125,2,-711380,566550,-806420,423990,'Guildford and Horsham'),
    new square_sheet(3,126,2,-711380,709110,-806420,566550,'Tunbridge Wells and Redhill'),
    new square_sheet(3,127,2,-711380,851670,-806420,709110,'Ashford and Tenterden'),
    new square_sheet(3,128,1,143,639,116,597,'Dover, Folkestone and Ashford'),
    new square_sheet(3,129,1,130,240,88,211,'Clovelly and Bude'),
    new square_sheet(3,130,1,110,278,181,235,'[Okehampton]'),
    new square_sheet(3,131,2,-806420,-146250,-901460,-288810,'Tiverton'),
    new square_sheet(3,132,2,-806420,-3690,-901460,-146250,'Chard'),
    new square_sheet(3,133,2,-806420,138870,-901460,-3690,'Yeovil and Blandford'),
    new square_sheet(3,134,2,-806420,281430,-901460,138870,'Romsey and Ringwood'),
    new square_sheet(3,135,2,-806420,423990,-901460,281430,'Southampton and Portsmouth'),
    new square_sheet(3,136,2,-806420,566550,-901460,423990,'Worthing, Chichester and Littlehampton'),
    new square_sheet(3,137,2,-806420,709110,-901460,566550,'Brighton, Eastbourne and Lewes'),
    new square_sheet(3,138,1,132,611,104,567,'Hastings, Winchelsea and Rye'),
    new square_sheet(3,139,2,-901460,-431370,-996500,-573930,'Boscastle and Padstow'),
    new square_sheet(3,140,2,-901460,-288810,-996500,-431370,'[Launceston]'),
    new square_sheet(3,141,2,-901460,-146250,-996500,-288810,'Exeter and Teignmouth'),
    new square_sheet(3,142,1,105,351,79,307,'Lyme Regis'),
    new square_sheet(3,143,2,-901460,138870,-996500,-3690,'Weymouth'),
    new square_sheet(3,144,1,103,423,74,380,'Bournemouth and Swanage'),
    new square_sheet(3,145,1,102,467,74,423,'Isle of Wight'),
    new square_sheet(3,146,1,68,197,38,155,'Truro'),
    new square_sheet(3,147,1,68,234,38,191,'[Bodmin]'),
    new square_sheet(3,148,1,73,264,45,220,'[Plymouth]'),
    new square_sheet(3,149,1,77,298,47,256,'Torquay'),
    new square_sheet(3,150,1,61,295,34,249,'Kingsbridge'),
    new square_sheet(3,151,1,44,154,18,125,'Lands End'),
    new square_sheet(3,151,1,19,97,5,80,'Lands End'),
    new square_sheet(3,152,1,39,195,10,154,'Falmouth and Lizard Point'),
 

    
// 	 Series 4 : One Inch Popular
    new square_sheet(4,1,2,951820,138870,809260,43830,'River Tweed'),
    new square_sheet(4,2,2,951820,233910,809260,138870,'Holy Island'),
    new square_sheet(4,3,2,809260,138870,714220,-3690,'Cheviot Hills'),
    new square_sheet(4,4,2,809260,255030,714220,112470,'Alnwick & Rothbury'),
    new square_sheet(4,5,2,714220,-3690,619180,-146250,'Solway Firth & River Esk'),
    new square_sheet(4,6,2,714220,138870,619180,-3690,'Hexham'),
    new square_sheet(4,7,2,714220,281430,619180,138870,'Newcastle Upon Tyne'),
    new square_sheet(4,8,2,619180,-109290,476620,-204330,'Workington & Cockermouth'),
    new square_sheet(4,9,2,619180,-3690,524140,-146250,'Carlisle'),
    new square_sheet(4,10,2,619180,138870,524140,-3690,'Alston & Weardale'),
    new square_sheet(4,11,2,619180,291990,524140,138870,'Durham & sunderland'),
    new square_sheet(4,12,2,524140,-3690,429100,-146250,'Keswick & Ambleside'),
    new square_sheet(4,13,2,524140,138870,429100,-3690,'Kirkby Stephen & Appleby'),
    new square_sheet(4,14,2,524140,281430,429100,138870,'Darlington'),
    new square_sheet(4,15,2,571660,334230,429100,233910,'Middlesbrough & Hartlepool'),
    new square_sheet(4,16,2,524140,476790,429100,334230,'Whitby & Saltburn'),
    new square_sheet(4,17,2,444940,-336330,302380,-463050,'Isle of Man'),
    new square_sheet(4,18,2,476620,-109290,334060,-204330,'Wasdale'),
    new square_sheet(4,19,2,429100,-3690,334060,-146250,'Windermere & Ulverston'),
    new square_sheet(4,20,2,429100,138870,334060,-3690,'Kirkby Lonsdale & Hawes'),
    new square_sheet(4,21,2,429100,281430,334060,138870,'Ripon & Northallerton'),
    new square_sheet(4,22,2,429100,423990,334060,281430,'Pickering & Thirsk'),
    new square_sheet(4,23,2,429100,566550,334060,423990,'Scarborough'),
    new square_sheet(4,24,2,334060,-3690,239020,-146250,'Lancaster & Barrow'),
    new square_sheet(4,25,2,334060,138870,239020,-3690,'Ribblesdale'),
    new square_sheet(4,26,2,334060,281430,239020,138870,'Harrogate'),
    new square_sheet(4,27,2,334060,423990,239020,281430,'York'),
    new square_sheet(4,28,2,334060,566550,239020,423990,'Gt Driffield & Bridlington'),
    new square_sheet(4,29,2,239020,43830,143980,-98730,'Preston, Southport & Blackpool'),
    new square_sheet(4,30,2,239020,138870,143980,-3690,'Blackburn'),
    new square_sheet(4,31,2,239020,281430,143980,138870,'Leeds & Bradford'),
    new square_sheet(4,32,2,239020,423990,143980,281430,'Goole & Pontefract'),
    new square_sheet(4,33,2,239020,566550,143980,423990,'Hull'),
    new square_sheet(4,34,2,239020,619350,96460,519030,'Mouth of the Humber'),
    new square_sheet(4,35,2,143980,-3690,48940,-146250,'Liverpool & Birkenhead'),
    new square_sheet(4,36,2,143980,138870,48940,-3690,'Bolton & Manchester'),
    new square_sheet(4,37,2,143980,281430,48940,138870,'Barnsley & Sheffield'),
    new square_sheet(4,38,2,143980,423990,48940,281430,'Doncaster'),
    new square_sheet(4,39,2,143980,566550,48940,423990,'Scunthorpe & Market Rasen'),
    new square_sheet(4,40,2,143980,661590,48940,519030,'Grimsby & Louth'),
    new square_sheet(4,41,2,80620,-288810,-46100,-441930,'Anglesey'),
    new square_sheet(4,42,2,70060,-146250,-46100,-288810,'Llandudno & Denbigh'),
    new square_sheet(4,43,2,48940,-3690,-46100,-146250,'Chester'),
    new square_sheet(4,44,2,48940,138870,-46100,-3690,'Northwich & Macclesfield'),
    new square_sheet(4,45,2,48940,281430,-46100,138870,'Buxton & Matlock'),
    new square_sheet(4,46,2,48940,423990,-46100,281430,'The Dukeries'),
    new square_sheet(4,47,2,48940,566550,-46100,426990,'Lincoln'),
    new square_sheet(4,48,2,48940,677430,-46100,534870,'Horncastle & Skegness'),
    new square_sheet(4,49,2,-46100,-288810,-162260,-468330,'Portmadoc & Criccieth'),
    new square_sheet(4,50,2,-46100,-146250,-141140,-288810,'Bala'),
    new square_sheet(4,51,2,-46100,-3690,-141140,-146250,'Wrexham & Oswestry'),
    new square_sheet(4,52,2,-46100,138870,-141140,-3690,'Stoke on Trent'),
    new square_sheet(4,53,2,-46100,281430,-141140,138870,'Derby'),
    new square_sheet(4,54,2,-46100,423990,-141140,281430,'Nottingham'),
    new square_sheet(4,55,2,-46100,566550,-141140,423990,'Grantham'),
    new square_sheet(4,56,2,-46100,709110,-141140,566550,'Boston'),
    new square_sheet(4,57,2,-61940,851670,-156980,709110,'Fakenham'),
    new square_sheet(4,58,2,-69860,994230,-164900,851670,'Cromer'),
    new square_sheet(4,59,2,-141140,-146250,-236180,-288810,'Dolgelly & Lake Vyrnwy'),
    new square_sheet(4,60,2,-141140,-3690,-236180,-146250,'Shrewsbury'),
    new square_sheet(4,61,2,-141140,138870,-236180,-3690,'Wolverhampton'),
    new square_sheet(4,62,2,-141140,281430,-236180,138870,'Burton & Walsall'),
    new square_sheet(4,63,2,-141140,423990,-236180,281430,'Leicester'),
    new square_sheet(4,64,2,-141140,566550,-236180,423990,'Peterborough'),
    new square_sheet(4,65,2,-141140,709110,-236180,566550,'Wisbech & Kings Lynn'),
    new square_sheet(4,66,2,-141140,851670,-236180,709110,'Swaffam & E.Dereham'),
    new square_sheet(4,67,2,-141140,994230,-236180,851670,'Norwich & Gt Yarmouth'),
    new square_sheet(4,68,2,-162260,-241290,-331220,-336330,'Barmouth & Aberystwyth'),
    new square_sheet(4,69,2,-236180,-146250,-331220,-288810,'Llanidloes'),
    new square_sheet(4,70,2,-236180,-3690,-331220,-146250,'Bishops Castle'),
    new square_sheet(4,71,2,-236180,138870,-331220,-3690,'Kidderminster'),
    new square_sheet(4,72,2,-236180,281430,-331220,138870,'Birmingham'),
    new square_sheet(4,73,2,-236180,423990,-331220,281430,'Rugby'),
    new square_sheet(4,74,2,-236180,566550,-331220,423990,'Kettering & Huntingdon'),
    new square_sheet(4,75,2,-236180,709110,-331220,566550,'Ely'),
    new square_sheet(4,76,2,-236180,851670,-331220,709110,'Thetford'),
    new square_sheet(4,77,2,-236180,994230,-331220,851670,'Lowestoft & Waveney Valley'),
    new square_sheet(4,78,2,-331220,-288810,-426260,-431370,'Lampeter'),
    new square_sheet(4,79,2,-331220,-146250,-426260,-288810,'Llandrindod Wells'),
    new square_sheet(4,80,2,-331220,-3690,-426260,-146250,'Kington'),
    new square_sheet(4,81,2,-331220,138870,-426260,-3690,'Worcester'),
    new square_sheet(4,82,2,-331220,281430,-426260,138870,'Stratford on Avon'),
    new square_sheet(4,83,2,-331220,423990,-426260,281430,'Northampton'),
    new square_sheet(4,84,2,-331220,566550,-426260,423990,'Bedford'),
    new square_sheet(4,85,2,-331220,709110,-426260,566550,'Cambridge'),
    new square_sheet(4,86,2,-331220,851670,-426260,709110,'Bury St.Edmunds & Sudbury'),
    new square_sheet(4,87,2,-331220,994230,-426260,851670,'Ipswich'),
    new square_sheet(4,88,2,-386660,-431370,-489620,-605610,'St.Davids & Cardigan'),
    new square_sheet(4,89,2,-426260,-288810,-521300,-431370,'Carmarthen'),
    new square_sheet(4,90,2,-426260,-146250,-521300,-288810,'Brecon & Llandovery'),
    new square_sheet(4,91,2,-426260,-3690,-521300,-146250,'Abergavenny'),
    new square_sheet(4,92,2,-426260,138870,-521300,-3690,'Gloucester & Forest of Dean'),
    new square_sheet(4,93,2,-426260,281430,-521300,138870,'Stow on the Wold'),
    new square_sheet(4,94,2,-426260,423990,-521300,281430,'Bicester'),
    new square_sheet(4,95,2,-426260,566550,-521300,423990,'Luton'),
    new square_sheet(4,96,2,-426260,709110,-521300,566550,'Hertford & Bishops Stortford'),
    new square_sheet(4,97,2,-426260,851670,-521300,709110,'Colchester'),
    new square_sheet(4,98,2,-426260,922950,-521300,780390,'Clacton on Sea & Harwich'),
    new square_sheet(4,99,2,-489620,-431370,-592580,-605610,'Pembroke & Tenby'),
    new square_sheet(4,100,2,-521300,-288810,-616340,-431370,'Llanelly'),
    new square_sheet(4,101,2,-521300,-146250,-616340,-288810,'Swansea & Aberdare'),
    new square_sheet(4,102,2,-521300,-3690,-616340,-146250,'Newport'),
    new square_sheet(4,103,2,-521300,138870,-616340,-3690,'Stroud & Chepstow'),
    new square_sheet(4,104,2,-521300,281430,-616340,138870,'Swindon & Cirencester'),
    new square_sheet(4,105,2,-521300,423990,-616340,281430,'Oxford & Henley on Thames'),
    new square_sheet(4,106,2,-521300,566550,-616340,423990,'Watford'),
    new square_sheet(4,107,2,-521300,709110,-616340,566550,'N.E.London & Epping Forest'),
    new square_sheet(4,108,2,-521300,851670,-616340,709110,'Southend'),
    new square_sheet(4,109,2,-584660,-67050,-679700,-246570,'Pontypridd & Barry'),
    new square_sheet(4,110,2,-616340,-3690,-711380,-146250,'Cardiff & Mouth of the Severn'),
    new square_sheet(4,111,2,-616340,138870,-711380,-3690,'Bath & Bristol'),
    new square_sheet(4,112,2,-616340,281430,-711380,138870,'Marlborough'),
    new square_sheet(4,113,2,-616340,423990,-711380,281430,'Reading & Newbury'),
    new square_sheet(4,114,2,-616340,566550,-711380,423990,'Windsor'),
    new square_sheet(4,115,2,-616340,709110,-711380,566550,'S.E.London & Sevenoaks'),
    new square_sheet(4,116,2,-616340,851670,-711380,709110,'Chatham & Maidstone'),
    new square_sheet(4,117,2,-632180,946710,-774740,851670,'East Kent'),
    new square_sheet(4,118,2,-711380,-230730,-806420,-373290,'Barnstaple & Exmoor'),
    new square_sheet(4,119,2,-711380,-146250,-806420,-288810,'Exmoor'),
    new square_sheet(4,120,2,-711380,-3690,-806420,-146250,'Bridgwater & Quantock Hills'),
    new square_sheet(4,121,2,-711380,138870,-806420,-3690,'Wells & Frome'),
    new square_sheet(4,122,2,-711380,281430,-806420,138870,'Salisbury & Bulford'),
    new square_sheet(4,123,2,-711380,423990,-806420,281430,'Winchester'),
    new square_sheet(4,124,2,-711380,566550,-806420,423990,'Guildford & Horsham'),
    new square_sheet(4,125,2,-711380,709110,-806420,566550,'Tunbridge Wells'),
    new square_sheet(4,126,2,-711380,851670,-806420,709110,'Weald of Kent'),
    new square_sheet(4,127,2,-806420,-288810,-901460,-439290,'River Torridge'),
    new square_sheet(4,128,2,-806420,-146250,-901460,-288810,'Tiverton'),
    new square_sheet(4,129,2,-806420,-3690,-901460,-146250,'Chard & Axminster'),
    new square_sheet(4,130,2,-806420,138870,-901460,-3690,'Yeovil & Blandford'),
    new square_sheet(4,131,2,-806420,281430,-901460,138870,'Wimborne & Ringwood'),
    new square_sheet(4,132,2,-806420,423990,-901460,281430,'Portsmouth & Southampton'),
    new square_sheet(4,133,2,-806420,566550,-901460,423990,'Chichester & Worthing'),
    new square_sheet(4,134,2,-806420,709110,-901460,566550,'Brighton & Eastbourne'),
    new square_sheet(4,135,2,-774740,851670,-869780,709110,'Hastings'),
    new square_sheet(4,136,2,-885620,-431370,-996500,-558090,'Boscastle & Padstow'),
    new square_sheet(4,137,2,-901460,-288810,-996500,-431370,'Dartmoor, Tavistock & Launceston'),
    new square_sheet(4,138,2,-901460,-146250,-996500,-288810,'Dartmoor & Exeter'),
    new square_sheet(4,139,2,-853940,-3690,-948980,-146250,'Sidmouth & Bridport'),
    new square_sheet(4,140,2,-853940,91350,-996500,-3690,'Weymouth & Dorchester'),
    new square_sheet(4,141,2,-869780,233910,-964820,91350,'Bournemouth & Swanage'),
    new square_sheet(4,142,2,-869780,376470,-964820,233910,'Isle of Wight'),
    new square_sheet(4,143,2,-996500,-431370,-1107380,-605610,'Truro'),
    new square_sheet(4,144,2,-996500,-288810,-1091540,-431370,'Plymouth'),
    new square_sheet(4,145,2,-996500,-177930,-1107380,-288810,'Torquay & Dartmouth'),
    new square_sheet(4,146,2,-1059860,-54250,-1186580,-716490,'Lands End & Lizard'),
// Insert
    new square_sheet(4,118,1,149,215,143,212,'Barnstaple & Exmoor'),
    new square_sheet(4,146,1,18,96,5,80,'Lands End & Lizard'),

// Series 12 Fifth Edition Small Sheet
    new square_sheet(12,95,2,-426260,566550,-521300,423990,'Luton'),
    new square_sheet(12,96,2,-426260,709110,-521300,566550,'Hertford & Bishops Stortford'),
    new square_sheet(12,106,2,-521300,566550,-616340,423990,'Watford'),
    new square_sheet(12,107,2,-521300,709110,-616340,566550,'N.E.London & Epping Forest'),
    new square_sheet(12,108,2,-521300,851670,-616340,709110,'Southend'),
    new square_sheet(12,113,2,-616340,423990,-711380,281430,'Reading & Newbury'),
    new square_sheet(12,114,2,-616340,566550,-711380,423990,'Windsor'),
    new square_sheet(12,115,2,-616340,709110,-711380,566550,'S.E.London & Sevenoaks'),
    new square_sheet(12,118,2,-711380,-230730,-806420,-373290,'Barnstaple & Exmoor'),
    new square_sheet(12,119,2,-711380,-146250,-806420,-288810,'Exmoor'),
    new square_sheet(12,123,2,-711380,423990,-806420,281430,'Winchester'),
    new square_sheet(12,124,2,-711380,566550,-806420,423990,'Guildford & Horsham'),
    new square_sheet(12,125,2,-711380,709110,-806420,566550,'Tunbridge Wells'),
    new square_sheet(12,127,2,-806420,-288810,-901460,-439290,'River Torridge'),
    new square_sheet(12,128,2,-806420,-146250,-901460,-288810,'Tiverton'),
    new square_sheet(12,136,2,-885620,-431370,-996500,-558090,'Boscastle & Padstow'),
    new square_sheet(12,137,2,-901460,-288810,-996500,-431370,'Dartmoor, Tavistock & Launceston'),
    new square_sheet(12,138,2,-901460,-146250,-996500,-288810,'Dartmoor & Exeter'),
    new square_sheet(12,143,2,-996500,-431370,-1107380,-605610,'Truro'),
    new square_sheet(12,144,2,-996500,-288810,-1091540,-431370,'Plymouth'),
    new square_sheet(12,145,2,-996500,-177930,-1107380,-288810,'Torquay & Dartmouth'),
    new square_sheet(12,146,2,-1059860,-54250,-1186580,-716490,'Lands End & Lizard'),
// Insert
     new square_sheet(12,118,1,149,215,143,212,'Barnstaple & Exmoor'),    

 // Series 13 Fifth Editon Large Sheet
    new square_sheet(13,93,6,1367,1037,1320,975,''),
    new square_sheet(13,94,6,1367,1095,1320,1035,''),
    new square_sheet(13,95,6,1367,1162,1320,1095,'St Albans'),
    new square_sheet(13,102,6,1337,982,1290,920,''),
    new square_sheet(13,111,6,1310,982,1263,915,''),
    new square_sheet(13,112,6,1322,1042,1275,980,''),
    new square_sheet(13,113,6,1322,1100,1275,1040,''),
    new square_sheet(13,114,6,1322,1162,1275,1095,'London'),
    new square_sheet(13,129,6,1277,947,1230,885,''),
    new square_sheet(13,130,6,1277,1007,1230,945,''),
    new square_sheet(13,131,6,1277,1072,1230,1005,''),
    new square_sheet(13,132,6,1280,1135,1233,1070,''),
    new square_sheet(13,139,6,1240,962,1195,900,''),
    new square_sheet(13,140,6,1232,1027,1185,960,''),
    new square_sheet(13,141,6,1237,1092,1190,1025,''),
    new square_sheet(13,142,6,1255,1152,1210,1090,''),
              
//    Series 5 : One-Inch New Popular Edition 
    new square_sheet(5,64,1,675,415,630,375,'Berwick-upon-Tweed',74466876),
    new square_sheet(5,71,1,640,430,595,390,'Alnwick',74466877),
    new square_sheet(5,75,1,595,333,550,293,'Dumfries',74466878),
    new square_sheet(5,76,1,595,373,550,333,'Carlisle',74466879),
    new square_sheet(5,77,1,595,413,550,373,'Hexham',74466880),
    new square_sheet(5,78,1,595,443,550,403,'Newcastle upon Tyne',74466881),
    new square_sheet(5,82,1,550,333,505,293,'Keswick',74466882),
    new square_sheet(5,83,1,550,373,505,333,'Penrith',74466883),
    new square_sheet(5,84,1,550,413,505,373,'Teesdale',74466884),
    new square_sheet(5,85,1,550,453,505,413,'Durham',74466885),
    new square_sheet(5,86,1,530,493,485,453,'Redcar & Whitby',74466886),
    new square_sheet(5,88,1,505,340,460,300,'Barrow in Furness',74466887),
    new square_sheet(5,89,1,505,370,460,330,'Lancaster and Kendal',74466888),
    new square_sheet(5,90,1,505,410,460,370,'Askrigg & Settle',74466889),
    new square_sheet(5,91,1,505,450,460,410,'Ripon',74466890),
    new square_sheet(5,92,1,505,490,460,450,'Pickering',74466891),
    new square_sheet(5,93,1,510,527,465,487,'Scarborough',74466892),
    new square_sheet(5,94,1,465,370,420,330,'Preston',74466893),
    new square_sheet(5,95,1,460,400,415,360,'Blackburn & Burnley',74466894),
    new square_sheet(5,96,1,460,440,415,400,'Leeds & Bradford',74466895),
    new square_sheet(5,97,1,465,480,420,440,'York',74466896),
    new square_sheet(5,98,1,465,500,420,460,'Market Weighton',74466897),
    new square_sheet(5,99,1,465,540,420,500,'Hull',74466898),
    new square_sheet(5,100,1,420,360,375,320,'Liverpool',74466899),
    new square_sheet(5,101,1,420,400,375,360,'Manchester',74466900),
    new square_sheet(5,102,1,430,440,385,400,'Huddersfield',74466901),
    new square_sheet(5,103,1,420,475,375,435,'Doncaster',74466902),
    new square_sheet(5,104,1,420,515,375,475,'Gainsborough',74466903),
    new square_sheet(5,105,1,420,555,375,515,'Grimsby',74466904),
    new square_sheet(5,106,1,398,261,353,221,'Anglesey',74466905),
    new square_sheet(5,107,1,385,288,340,248,'Snowdon',74466906),
    new square_sheet(5,108,1,385,328,340,288,'Denbigh',74466907),
    new square_sheet(5,109,1,390,360,345,320,'Chester',74466908),
    new square_sheet(5,110,1,375,400,330,360,'Stoke on Trent',74466909),
    new square_sheet(5,111,1,390,440,345,400,'Buxton & Matlock',74466910),
    new square_sheet(5,112,1,375,480,330,440,'Nottingham',74466911),
    new square_sheet(5,113,1,375,520,330,480,'Lincoln & Grantham',74466912),
    new square_sheet(5,114,1,375,560,330,520,'Boston & Skegness',74466913),
    new square_sheet(5,115,1,365,250,320,210,'Pwllheli',74466914),
    new square_sheet(5,116,1,353,288,308,248,'Dolgelly',74466915),
    new square_sheet(5,117,1,345,328,300,288,'Bala & Welshpool',74466916),
    new square_sheet(5,118,1,345,368,300,328,'Shrewsbury',74466917),
    new square_sheet(5,119,1,345,400,300,360,'Stafford',74466918),
    new square_sheet(5,120,1,345,440,300,400,'Derby & Burton upon Trent',74466919),
    new square_sheet(5,121,1,345,468,300,428,"Derby, Nottingham & Leicester')",74466920),
    new square_sheet(5,122,1,345,495,300,455,'Melton Mowbray',74466921),
    new square_sheet(5,123,1,345,535,300,495,'Spalding',74466922),
    new square_sheet(5,124,1,345,575,300,535,'Kings Lynn',74466923),
    new square_sheet(5,125,1,347,615,302,575,'Fakenham',74466924),
    new square_sheet(5,126,1,347,655,302,615,'Norwich',74466925),
    new square_sheet(5,127,1,308,288,263,248,'Aberystwyth',74466926),
    new square_sheet(5,128,1,300,328,255,288,'Montgomery and Llandrindod Wells',74466927),
    new square_sheet(5,129,1,300,368,255,328,'Ludlow',74466928),
    new square_sheet(5,130,1,300,400,255,360,'Kidderminster',74466929),
    new square_sheet(5,131,1,300,428,255,388,'Birmingham',74466930),
    new square_sheet(5,132,1,300,468,255,428,'Coventry & Rugby',74466931),
    new square_sheet(5,133,1,300,495,255,455,'Northampton',74466932),
    new square_sheet(5,134,1,300,535,255,495,'Huntingdon & Peterborough',74466933),
    new square_sheet(5,135,1,300,575,255,535,'Cambridge & Ely',74466934),
    new square_sheet(5,136,1,302,615,257,575,'Bury St Edmunds',74466935),
    new square_sheet(5,137,1,302,655,257,615,'Lowestoft',74466936),
    new square_sheet(5,138,1,250,208,205,168,'Fishguard',74466937),
    new square_sheet(5,139,1,264,248,218,208,'Cardigan',74466938),
    new square_sheet(5,140,1,263,288,218,248,'Llandovery',74466939),
    new square_sheet(5,141,1,255,328,210,288,'Brecon',74466940),
    new square_sheet(5,142,1,255,368,210,328,'Hereford',74466941),
    new square_sheet(5,143,1,255,400,210,360,'Gloucester & Malvern',74466942),
    new square_sheet(5,144,1,255,428,210,388,'Cheltenham & Evesham',74466943),
    new square_sheet(5,145,1,255,468,210,428,'Banbury',74466944),
    new square_sheet(5,146,1,255,495,210,455,'Buckingham',74466945),
    new square_sheet(5,147,1,255,535,210,495,'Bedford & Luton',74466946),
    new square_sheet(5,148,1,255,575,210,535,'Saffron Walden',74466947),
    new square_sheet(5,149,1,257,610,212,570,'Colchester',74466948),
    new square_sheet(5,150,1,257,650,212,610,'Ipswich',74466949),
    new square_sheet(5,151,1,235,208,190,168,'Pembroke',74466950),
    new square_sheet(5,152,1,225,248,180,208,'Carmarthen and Tenby',74466951),
    new square_sheet(5,153,1,218,288,173,248,'Swansea',74466952),
    new square_sheet(5,154,1,210,328,165,288,'Cardiff',74466953),
    new square_sheet(5,155,1,210,368,165,328,'Bristol & Newport',74466954),
    new square_sheet(5,156,1,210,393,165,353,'Bristol & Stroud',74466955),
    new square_sheet(5,157,1,210,428,165,388,'Swindon',74466956),
    new square_sheet(5,158,1,210,468,165,428,'Oxford & Newbury',74466957),
    new square_sheet(5,159,1,218,503,173,463,'The Chilterns',74466958),
    new square_sheet(5,160,1,225,535,180,495,'London NW',74466959),
    new square_sheet(5,161,1,215,575,170,535,'London NE',74466960),
    new square_sheet(5,162,1,225,610,180,570,'Southend-on-Sea',74466961),
    new square_sheet(5,163,1,155,280,110,240,'Barnstaple',74466962),
    new square_sheet(5,164,1,155,320,110,280,'Minehead',74466963),
    new square_sheet(5,165,1,175,360,130,320,'Weston-super-Mare',74466964),
    new square_sheet(5,166,1,165,393,120,353,'Frome',74466965),
    new square_sheet(5,167,1,165,428,120,388,'Salisbury',74466966),
    new square_sheet(5,168,1,165,468,120,428,'Winchester',74466967),
    new square_sheet(5,169,1,173,505,128,463,'Aldershot',74466968),
    new square_sheet(5,170,1,180,535,135,495,'London SW',74466969),
    new square_sheet(5,171,1,180,575,135,535,'London SE',74466970),
    new square_sheet(5,172,1,180,610,135,570,'Chatham & Maidstone',74466971),
    new square_sheet(5,173,1,173,642,128,602,'East Kent',74466972),
    new square_sheet(5,174,1,125,240,80,200,'Bude',74466973),
    new square_sheet(5,175,1,115,280,70,240,'Okehampton',74466974),
    new square_sheet(5,176,1,115,320,70,280,'Exeter',74466975),
    new square_sheet(5,177,1,130,360,85,320,'Taunton & Lyme Regis',74466976),
    new square_sheet(5,178,1,120,393,75,353,'Dorchester',74466977),
    new square_sheet(5,179,1,120,428,75,388,'Bournemouth',74466978),
    new square_sheet(5,180,1,120,468,75,428,'The Solent',74466979),
    new square_sheet(5,181,1,135,503,90,463,'Chichester',74466980),
    new square_sheet(5,182,1,145,535,100,495,'Brighton & Worthing',74466981),
    new square_sheet(5,183,1,138,575,93,535,'Eastbourne',74466982),
    new square_sheet(5,184,1,150,610,105,570,'Hastings',74466983),
    new square_sheet(5,185,1,95,210,50,170,'Newquay & Padstow',74466984),
    new square_sheet(5,186,1,90,240,45,200,'Bodmin & Launceston',74466985),
    new square_sheet(5,187,1,80,280,35,240,'Plymouth',74466986),
    new square_sheet(5,188,1,80,300,35,260,'Torquay',74466987),
    new square_sheet(5,189,1,55,170,10,130,'Land\'s End',74466988),
    new square_sheet(5,190,1,55,210,10,170,'Truro & Falmouth',74466989),
//	Inserts
	new square_sheet(5,106,1,383,266,361,261,'Anglesey',74466905),
	new square_sheet(5,137,1,297,656,292,655,'Lowestoft',74466936),
	new square_sheet(5,138,1,229,168,222,165,'Fishguard',74466937),
	new square_sheet(5,151,1,229,168,222,165,'Pembroke',74466950),
	new square_sheet(5,151,1,210,161,206,146,'Pembroke',74466950),
	new square_sheet(5,163,1,149,215,143,212,'Barnstaple',74466962),
	new square_sheet(5,178,1,75,371,68,367,'Dorchester',74466977),
	new square_sheet(5,181,1,102,463,98,462,'Chichester',74466980),
	new square_sheet(5,182,1,95,500,100,495,'Brighton & Worthing',74466981),
	new square_sheet(5,189,1,18,96,5,80,'Land\'s End',74466988),

    
//    Series 6 : One-Inch Map of Scotland (1st Edition)
    new square_sheet(6,1,3,-1003483,-171069,-1098523,-297789,'Kirkmaiden',74487491),
    new square_sheet(6,2,3,-1003483,-44349,-1098523,-171069,'[Whithorn]',74488549),
    new square_sheet(6,3,3,-908443,-171069,-1003483,-297789,'[Stranraer]',74488554),
    new square_sheet(6,4,3,-908443,-44349,-1003483,-171069,'[Wigtown]',74488555),
    new square_sheet(6,5,3,-908443,82371,-1003483,-44349,'[Kirkcudbright]',74488558),
    new square_sheet(6,6,3,-908443,209091,-1003483,82371,'[Annan]',74488561),
    new square_sheet(6,7,3,-813403,-171069,-908443,-297789,'[Girvan]',74488564),
    new square_sheet(6,8,3,-813403,-44349,-908443,-171069,'[Carrick]',74488567),
    new square_sheet(6,9,3,-813403,82371,-908443,-44349,'[Maxwelltown]',74488570),
    new square_sheet(6,10,3,-813403,209091,-908443,82371,'Dumfries',74488573),
    new square_sheet(6,11,3,-813403,335811,-908443,209091,'Langholm',74488576),
    new square_sheet(6,12,3,-718363,-297789,-813403,-424509,'Campbeltown',74488579),
    new square_sheet(6,13,3,-718363,-171069,-813403,-297789,'Arran',74488582),
    new square_sheet(6,14,3,-718363,-44349,-813403,-171069,'Ayr',74488585),
    new square_sheet(6,15,3,-718363,82371,-813403,-44349,'Sanquhar',74488588),
    new square_sheet(6,16,3,-718363,209091,-813403,82371,'Moffat',74488596),
    new square_sheet(6,17,3,-718363,335811,-813403,209091,'Jedburgh',74488599),
    new square_sheet(6,18,3,-718363,462531,-813403,335811,'Morebattle',74488681),
    new square_sheet(6,19,3,-623323,-424509,-718363,-551229,'Bowmore',74488602),
    new square_sheet(6,20,3,-623323,-297789,-718363,-424509,'Killean',74488605),
    new square_sheet(6,21,3,-623323,-171069,-718363,-297789,'Arran',74488608),
    new square_sheet(6,22,3,-623323,-44349,-718363,-171069,'Kilmarnock',74488611),
    new square_sheet(6,23,3,-623323,82371,-718363,-44349,'Hamilton',74488614),
    new square_sheet(6,24,3,-623323,209091,-718363,82371,'Peebles',74488617),
    new square_sheet(6,25,3,-623323,335811,-718363,209091,'Kelso',74488620),
    new square_sheet(6,26,3,-623323,462531,-718363,335811,'Berwick upon Tweed',74488623),
    new square_sheet(6,27,3,-528283,-424509,-623323,-551229,'Port Ascaig',74488626),
    new square_sheet(6,28,3,-528283,-297789,-623323,-424509,'Jura',74488678),
    new square_sheet(6,29,3,-528283,-171069,-623323,-297789,'Rothesay',74488684),
    new square_sheet(6,30,3,-528283,-44349,-623323,-171069,'Glasgow',74488687),
    new square_sheet(6,31,3,-528283,82371,-623323,-44349,'Airdrie',74488691),
    new square_sheet(6,32,3,-528283,209091,-623323,82371,'[Edinburgh]',74488698),
    new square_sheet(6,33,3,-528283,335811,-623323,209091,'[Haddington]',74488704),
    new square_sheet(6,34,3,-528283,462531,-623323,335811,'[Eyemouth]',74488708),
    new square_sheet(6,35,3,-433243,-424509,-528283,-551229,'Colonsay',74488713),
    new square_sheet(6,36,3,-433243,-297789,-528283,-424509,'Kilmartin',74488717),
    new square_sheet(6,37,3,-433243,-171069,-528283,-297789,'Inveraray',74488721),
    new square_sheet(6,38,3,-433243,-44349,-528283,-171069,'Loch Lomond',74488741),
    new square_sheet(6,39,3,-433243,82371,-528283,-44349,'Stirling',74489034),
    new square_sheet(6,40,3,-433243,209091,-528283,82371,'[Kinross]',74489037),
    new square_sheet(6,41,3,-433243,335811,-528283,209091,'[North Berwick]',74489040),
    new square_sheet(6,42,3,-338203,-551229,-433243,-677949,'Tiree',74489043),
    new square_sheet(6,43,3,-338203,-424509,-433243,-551229,'Iona',74489046),
    new square_sheet(6,44,3,-338203,-297789,-433243,-424509,'Mull',74489049),
    new square_sheet(6,45,3,-338203,-171069,-433243,-297789,'Oban',74489052),
    new square_sheet(6,46,3,-338203,-44349,-433243,-171069,'Balquhidder',74489055),
    new square_sheet(6,47,3,-338203,82371,-433243,-44349,'Crieff',74489058),
    new square_sheet(6,48,3,-338203,209091,-433243,82371,'Perth',74489061),
    new square_sheet(6,49,3,-338203,335811,-433243,209091,'Arbroath',74489064),
    new square_sheet(6,50,3,-243163,-551229,-338203,-677949,'Miodar',74489067),
    new square_sheet(6,51,3,-243163,-424509,-338203,-551229,'Coll',74489281),
    new square_sheet(6,52,3,-243163,-297789,-338203,-424509,'Tobermory',74489284),
    new square_sheet(6,53,3,-243163,-171069,-338203,-297789,'Ben Nevis',74490355),
    new square_sheet(6,54,3,-243163,-44349,-338203,-171069,'Rannoch',74490358),
    new square_sheet(6,55,3,-243163,82371,-338203,-44349,'Blair Atholl',74490361),
    new square_sheet(6,56,3,-243163,209091,-338203,82371,'Blairgowrie',74490364),
    new square_sheet(6,57,3,-243163,335811,-338203,209091,'Forfar',74490367),
    new square_sheet(6,58,3,-148123,-677949,-243163,-804669,'Barra',74490373),
    new square_sheet(6,59,3,-148123,-551229,-243163,-677949,'Gighay',74490376),
    new square_sheet(6,60,3,-148123,-424509,-243163,-551229,'Rum',74490379),
    new square_sheet(6,61,3,-148123,-297789,-243163,-424509,'Arisaig',74490382),
    new square_sheet(6,62,3,-148123,-171069,-243163,-297789,'Loch Eil',74490385),
    new square_sheet(6,63,3,-148123,-44349,-243163,-171069,'Glen Roy',74490388),
    new square_sheet(6,64,3,-148123,82371,-243163,-44349,'Kingussie',74490391),
    new square_sheet(6,65,3,-148123,209091,-243163,82371,'Balmoral',74490394),
    new square_sheet(6,66,3,-148123,335811,-243163,209091,'Banchory',74490397),
    new square_sheet(6,67,3,-148123,462531,-243163,335811,'Stonehaven',74490400),
    new square_sheet(6,68,3,-53083,-677949,-148123,-804669,'Fiaray',74490403),
    new square_sheet(6,69,3,-53083,-551229,-148123,-677949,'South Uist',74490406),
    new square_sheet(6,70,3,-53083,-424509,-148123,-551229,'Minginish',74490409),
    new square_sheet(6,71,3,-53083,-297789,-148123,-424509,'Glenelg',74490412),
    new square_sheet(6,72,3,-53083,-171069,-148123,-297789,'Clunie',74490415),
    new square_sheet(6,73,3,-53083,-44349,-148123,-171069,'Fort Augustus',74490554),
    new square_sheet(6,74,3,-53083,82371,-148123,-44349,'Grantown',74490557),
    new square_sheet(6,75,3,-53083,209091,-148123,82371,'Tomintoul',74490560),
    new square_sheet(6,76,3,-53083,335811,-148123,209091,'Inverurie',74490563),
    new square_sheet(6,77,3,-53083,462531,-148123,335811,'Aberdeen',74490566),
    new square_sheet(6,78,3,41957,-677949,-53083,-804669,'Monach',74490569),
    new square_sheet(6,79,3,41957,-551229,-53083,-677949,'Benbecula',74490572),
    new square_sheet(6,80,3,41957,-424509,-53083,-551229,'Portree',74490575),
    new square_sheet(6,81,3,41957,-297789,-53083,-424509,'Applecross',74490578),
    new square_sheet(6,82,3,41957,-171069,-53083,-297789,'Lochcarron',74490581),
    new square_sheet(6,83,3,41957,-44349,-53083,-171069,'Inverness',74490584),
    new square_sheet(6,84,3,41957,82371,-53083,-44349,'Nairn',74490587),
    new square_sheet(6,85,3,41957,209091,-53083,82371,'Rothes',74490590),
    new square_sheet(6,86,3,41957,335811,-53083,209091,'Huntly',74490593),
    new square_sheet(6,87,3,41957,462531,-53083,335811,'Peterhead',74490596),
    new square_sheet(6,88,3,136997,-677949,41957,-804669,'Hougary',74490599),
    new square_sheet(6,89,3,136997,-551229,41957,-677949,'Sollas',74490602),
    new square_sheet(6,90,3,136997,-424509,41957,-551229,'Rudha Hunish',74490605),
    new square_sheet(6,91,3,136997,-297789,41957,-424509,'Gairloch',74490608),
    new square_sheet(6,92,3,136997,-171069,41957,-297789,'Inverbroom',74490611),
    new square_sheet(6,93,3,136997,-44349,41957,-171069,'Alness',74490614),
    new square_sheet(6,94,3,136997,82371,41957,-44349,'Cromarty',74490617),
    new square_sheet(6,95,3,136997,209091,41957,82371,'Elgin',74490620),
    new square_sheet(6,96,3,136997,335811,41957,209091,'Banff',74490623),
    new square_sheet(6,97,3,136997,462531,41957,335811,'Fraserburgh',74490626),
    new square_sheet(6,98,3,232037,-551229,136997,-677949,'Scarp',74490630),
    new square_sheet(6,99,3,232037,-424509,136997,-551229,'Isle of Lewis',74490633),
    new square_sheet(6,100,3,232037,-297789,136997,-424509,'Achagarve',74490637),
    new square_sheet(6,101,3,232037,-171069,136997,-297789,'Ullapool',74490640),
    new square_sheet(6,102,3,232037,-44349,136997,-171069,'Lairg',74490643),
    new square_sheet(6,103,3,232037,82371,136997,-44349,'Golspie',74490646),
    new square_sheet(6,104,3,327077,-551229,232037,-677949,'[Valtos]',74490649),
    new square_sheet(6,105,3,327077,-424509,232037,-551229,'Stornoway',74490653),
    new square_sheet(6,106,3,327077,-297789,232037,-424509,'[Portnaguiran]',74490656),
    new square_sheet(6,107,3,327077,-171069,232037,-297789,'Lochinver',74490659),
    new square_sheet(6,108,3,327077,-44349,232037,-171069,'Altnaharra',74490662),
    new square_sheet(6,109,3,327077,82371,232037,-44349,'Auchintoul',74490665),
    new square_sheet(6,110,3,327077,209091,232037,82371,'Latheron',74490668),
    new square_sheet(6,111,3,422117,-424509,327077,-551229,'[Butt of Lewis]',74490671),
    new square_sheet(6,112,3,422117,-297789,327077,-424509,'[Cellar Head]',74490674),
    new square_sheet(6,113,3,422117,-171069,327077,-297789,'Cape Wrath',74491049),
    new square_sheet(6,114,3,422117,-44349,327077,-171069,'Tongue',74491052),
    new square_sheet(6,115,3,422117,82371,327077,-44349,'Reay',74491055),
    new square_sheet(6,116,3,422117,209091,327077,82371,'Wick',74491058),
    new square_sheet(6,117,3,517157,209091,422117,82371,'Hoy',74491061),
    new square_sheet(6,118,3,517157,335811,422117,209091,'Copinsay',74491064),
    new square_sheet(6,119,3,612197,209091,517157,82371,'Kirkwall',74491067),
    new square_sheet(6,120,3,612197,335811,517157,209091,'Stronsay',74491070),
    new square_sheet(6,121,3,707237,209091,612197,82371,'Westray',74491073),
    new square_sheet(6,122,3,707237,335811,612197,209091,'Sanday',74491076),
    new square_sheet(6,123,3,802277,462531,707237,335811,'Fair Isle',74491079),
    new square_sheet(6,124,3,897317,589251,802277,462531,'Sumburgh',74491082),
    new square_sheet(6,125,3,992357,462531,897317,335811,'Foula',74491085),
    new square_sheet(6,126,3,992357,589251,897317,462531,'Lerwick',74491088),
    new square_sheet(6,127,3,1087397,462531,992357,335811,'Sandness',74491091),
    new square_sheet(6,128,3,1087397,589251,992357,462531,'Whalsay',74491094),
    new square_sheet(6,129,3,1182437,462531,1087397,335811,'Hillswick',74491097),
    new square_sheet(6,130,3,1182437,589251,1087397,462531,'Yell',74491100),
    new square_sheet(6,131,3,1277477,589251,1182437,462531,'Unst',74491103),

//    Series 15 : One-Inch Map of Scotland (2nd Edition)
    new square_sheet(15,1,3,-1003483,-171069,-1098523,-297789,'Kirkmaiden',74487492),
    new square_sheet(15,2,3,-1003483,-44349,-1098523,-171069,'Whithorn',74488550),
    new square_sheet(15,3,3,-908443,-171069,-1003483,-297789,'Stranraer',74488553),
    new square_sheet(15,4,3,-908443,-44349,-1003483,-171069,'Wigtown',74488556),
    new square_sheet(15,5,3,-908443,82371,-1003483,-44349,'Kirkcudbright',74488559),
    new square_sheet(15,6,3,-908443,209091,-1003483,82371,'Annan',74488562),
    new square_sheet(15,7,3,-813403,-171069,-908443,-297789,'Girvan',74488565),
    new square_sheet(15,8,3,-813403,-44349,-908443,-171069,'Carrick',74488568),
    new square_sheet(15,9,3,-813403,82371,-908443,-44349,'Maxwelltown',74488571),
    new square_sheet(15,10,3,-813403,209091,-908443,82371,'Dumfries',74488574),
    new square_sheet(15,11,3,-813403,335811,-908443,209091,'Langholm',74488577),
    new square_sheet(15,12,3,-718363,-297789,-813403,-424509,'Campbeltown',74488580),
    new square_sheet(15,13,3,-718363,-171069,-813403,-297789,'Arran',74488583),
    new square_sheet(15,14,3,-718363,-44349,-813403,-171069,'Ayr',74488586),
    new square_sheet(15,15,3,-718363,82371,-813403,-44349,'Sanquhar',74488589),
    new square_sheet(15,16,3,-718363,209091,-813403,82371,'Moffat',74488597),
    new square_sheet(15,17,3,-718363,335811,-813403,209091,'Jedburgh',74488600),
    new square_sheet(15,18,3,-718363,462531,-813403,335811,'Morebattle',74488682),
    new square_sheet(15,19,3,-623323,-424509,-718363,-551229,'Bowmore',74488603),
    new square_sheet(15,20,3,-623323,-297789,-718363,-424509,'Killean',74488606),
    new square_sheet(15,21,3,-623323,-171069,-718363,-297789,'Arran',74488609),
    new square_sheet(15,22,3,-623323,-44349,-718363,-171069,'Kilmarnock',74488612),
    new square_sheet(15,23,3,-623323,82371,-718363,-44349,'Hamilton',74488615),
    new square_sheet(15,24,3,-623323,209091,-718363,82371,'Peebles',74488618),
    new square_sheet(15,25,3,-623323,335811,-718363,209091,'Kelso',74488621),
    new square_sheet(15,26,3,-623323,462531,-718363,335811,'Berwick upon Tweed',74488624),
    new square_sheet(15,27,3,-528283,-424509,-623323,-551229,'Port Ascaig',74488627),
    new square_sheet(15,28,3,-528283,-297789,-623323,-424509,'Jura',74488679),
    new square_sheet(15,29,3,-528283,-171069,-623323,-297789,'Rothesay',74488685),
    new square_sheet(15,30,3,-528283,-44349,-623323,-171069,'Glasgow',74488689),
    new square_sheet(15,31,3,-528283,82371,-623323,-44349,'Airdrie',74488693),
    new square_sheet(15,32,3,-528283,209091,-623323,82371,'Edinburgh',74488700),
    new square_sheet(15,33,3,-528283,335811,-623323,209091,'Haddington',74488705),
    new square_sheet(15,34,3,-528283,462531,-623323,335811,'Eyemouth',74488711),
    new square_sheet(15,35,3,-433243,-424509,-528283,-551229,'Colonsay',74488714),
    new square_sheet(15,36,3,-433243,-297789,-528283,-424509,'Kilmartin',74488719),
    new square_sheet(15,37,3,-433243,-171069,-528283,-297789,'Inveraray',74488722),
    new square_sheet(15,38,3,-433243,-44349,-528283,-171069,'Loch Lomond',74488742),
    new square_sheet(15,39,3,-433243,82371,-528283,-44349,'Stirling',74489035),
    new square_sheet(15,40,3,-433243,209091,-528283,82371,'Kinross',74489038),
    new square_sheet(15,41,3,-433243,335811,-528283,209091,'North Berwick',74489041),
    new square_sheet(15,42,3,-338203,-551229,-433243,-677949,'Tiree',74489044),
    new square_sheet(15,43,3,-338203,-424509,-433243,-551229,'Iona',74489047),
    new square_sheet(15,44,3,-338203,-297789,-433243,-424509,'Mull',74489050),
    new square_sheet(15,45,3,-338203,-171069,-433243,-297789,'Oban',74489053),
    new square_sheet(15,46,3,-338203,-44349,-433243,-171069,'Balquhidder',74489056),
    new square_sheet(15,47,3,-338203,82371,-433243,-44349,'Crieff',74489059),
    new square_sheet(15,48,3,-338203,209091,-433243,82371,'Perth',74489062),
    new square_sheet(15,49,3,-338203,335811,-433243,209091,'Arbroath',74489065),
    new square_sheet(15,50,3,-243163,-551229,-338203,-677949,'Miodar',74489068),
    new square_sheet(15,51,3,-243163,-424509,-338203,-551229,'Coll',74489282),
    new square_sheet(15,52,3,-243163,-297789,-338203,-424509,'Tobermory',74489285),
    new square_sheet(15,53,3,-243163,-171069,-338203,-297789,'Ben Nevis',74490356),
    new square_sheet(15,54,3,-243163,-44349,-338203,-171069,'Rannoch',74490359),
    new square_sheet(15,55,3,-243163,82371,-338203,-44349,'Blair Atholl',74490362),
    new square_sheet(15,56,3,-243163,209091,-338203,82371,'Blairgowrie',74490365),
    new square_sheet(15,57,3,-243163,335811,-338203,209091,'Forfar',74490368),
    new square_sheet(15,58,3,-148123,-677949,-243163,-804669,'Barra',74490374),
    new square_sheet(15,59,3,-148123,-551229,-243163,-677949,'Gighay',74490377),
    new square_sheet(15,60,3,-148123,-424509,-243163,-551229,'Rum',74490380),
    new square_sheet(15,61,3,-148123,-297789,-243163,-424509,'Arisaig',74490383),
    new square_sheet(15,62,3,-148123,-171069,-243163,-297789,'Loch Eil',74490386),
    new square_sheet(15,63,3,-148123,-44349,-243163,-171069,'Glen Roy',74490389),
    new square_sheet(15,64,3,-148123,82371,-243163,-44349,'Kingussie',74490392),
    new square_sheet(15,65,3,-148123,209091,-243163,82371,'Balmoral',74490395),
    new square_sheet(15,66,3,-148123,335811,-243163,209091,'Banchory',74490398),
    new square_sheet(15,67,3,-148123,462531,-243163,335811,'Stonehaven',74490401),
    new square_sheet(15,68,3,-53083,-677949,-148123,-804669,'Fiaray',74490404),
    new square_sheet(15,69,3,-53083,-551229,-148123,-677949,'South Uist',74490407),
    new square_sheet(15,70,3,-53083,-424509,-148123,-551229,'Minginish',74490410),
    new square_sheet(15,71,3,-53083,-297789,-148123,-424509,'Glenelg',74490413),
    new square_sheet(15,72,3,-53083,-171069,-148123,-297789,'Cluanie',74490416),
    new square_sheet(15,73,3,-53083,-44349,-148123,-171069,'Fort Augustus',74490555),
    new square_sheet(15,74,3,-53083,82371,-148123,-44349,'Grantown',75520799),
    new square_sheet(15,75,3,-53083,209091,-148123,82371,'Tomintoul',74490561),
    new square_sheet(15,76,3,-53083,335811,-148123,209091,'Inverurie',74490564),
    new square_sheet(15,77,3,-53083,462531,-148123,335811,'Aberdeen',74490567),
    new square_sheet(15,78,3,41957,-677949,-53083,-804669,'Monach',74490570),
    new square_sheet(15,79,3,41957,-551229,-53083,-677949,'Benbecula',74490573),
    new square_sheet(15,80,3,41957,-424509,-53083,-551229,'Portree',74490576),
    new square_sheet(15,81,3,41957,-297789,-53083,-424509,'Applecross',74490579),
    new square_sheet(15,82,3,41957,-171069,-53083,-297789,'Lochcarron',74490582),
    new square_sheet(15,83,3,41957,-44349,-53083,-171069,'Inverness',74490585),
    new square_sheet(15,84,3,41957,82371,-53083,-44349,'Nairn',74490588),
    new square_sheet(15,85,3,41957,209091,-53083,82371,'Rothes',74490591),
    new square_sheet(15,86,3,41957,335811,-53083,209091,'Huntly',74490594),
    new square_sheet(15,87,3,41957,462531,-53083,335811,'Peterhead',74490597),
    new square_sheet(15,88,3,136997,-677949,41957,-804669,'Hougary',74490600),
    new square_sheet(15,89,3,136997,-551229,41957,-677949,'Sollas',74490603),
    new square_sheet(15,90,3,136997,-424509,41957,-551229,'Rudha Hunish',74490606),
    new square_sheet(15,91,3,136997,-297789,41957,-424509,'Gairloch',74490609),
    new square_sheet(15,92,3,136997,-171069,41957,-297789,'Inverbroom',74490612),
    new square_sheet(15,93,3,136997,-44349,41957,-171069,'Alness',74490615),
    new square_sheet(15,94,3,136997,82371,41957,-44349,'Cromarty',74490618),
    new square_sheet(15,95,3,136997,209091,41957,82371,'Elgin',74490621),
    new square_sheet(15,96,3,136997,335811,41957,209091,'Banff',74490624),
    new square_sheet(15,97,3,136997,462531,41957,335811,'Fraserburgh',74490627),
    new square_sheet(15,98,3,232037,-551229,136997,-677949,'Scarp',74490631),
    new square_sheet(15,99,3,232037,-424509,136997,-551229,'Tarbert',74490635),
    new square_sheet(15,100,3,232037,-297789,136997,-424509,'Achagarve',74490638),
    new square_sheet(15,101,3,232037,-171069,136997,-297789,'Ullapool',74490641),
    new square_sheet(15,102,3,232037,-44349,136997,-171069,'Lairg',74490644),
    new square_sheet(15,103,3,232037,82371,136997,-44349,'Golspie',74490647),
    new square_sheet(15,104,3,327077,-551229,232037,-677949,'Valtos',74490651),
    new square_sheet(15,105,3,327077,-424509,232037,-551229,'Stornoway',74490654),
    new square_sheet(15,106,3,327077,-297789,232037,-424509,'Portnaguiran',74490657),
    new square_sheet(15,107,3,327077,-171069,232037,-297789,'Lochinver',74490660),
    new square_sheet(15,108,3,327077,-44349,232037,-171069,'Altnaharra',74490663),
    new square_sheet(15,109,3,327077,82371,232037,-44349,'Auchintoul',74490666),
    new square_sheet(15,110,3,327077,209091,232037,82371,'Latheron',74490669),
    new square_sheet(15,111,3,422117,-424509,327077,-551229,'Butt of Lewis',74490672),
    new square_sheet(15,112,3,422117,-297789,327077,-424509,'Cellar Head',74490675),
    new square_sheet(15,113,3,422117,-171069,327077,-297789,'Cape Wrath',74491050),
    new square_sheet(15,114,3,422117,-44349,327077,-171069,'Tongue',74491053),
    new square_sheet(15,115,3,422117,82371,327077,-44349,'Reay',74491056),
    new square_sheet(15,116,3,422117,209091,327077,82371,'Wick',74491059),
    new square_sheet(15,117,3,517157,209091,422117,82371,'Hoy',74491062),
    new square_sheet(15,118,3,517157,335811,422117,209091,'Copinsay',74491065),
    new square_sheet(15,119,3,612197,209091,517157,82371,'Kirkwall',74491068),
    new square_sheet(15,120,3,612197,335811,517157,209091,'Stronsay',74491071),
    new square_sheet(15,121,3,707237,209091,612197,82371,'Westray',74491074),
    new square_sheet(15,122,3,707237,335811,612197,209091,'Sanday',74491077),
    new square_sheet(15,123,3,802277,462531,707237,335811,'Fair Isle',74491080),
    new square_sheet(15,124,3,897317,589251,802277,462531,'Sumburgh',74491083),
    new square_sheet(15,125,3,992357,462531,897317,335811,'Foula',74491086),
    new square_sheet(15,126,3,992357,589251,897317,462531,'Lerwick',74491089),
    new square_sheet(15,127,3,1087397,462531,992357,335811,'Sandness',74491092),
    new square_sheet(15,128,3,1087397,589251,992357,462531,'Whalsay',74491095),
    new square_sheet(15,129,3,1182437,462531,1087397,335811,'Hillswick',74491098),
    new square_sheet(15,130,3,1182437,589251,1087397,462531,'Yell',74491101),
    new square_sheet(15,131,3,1277477,589251,1182437,462531,'Unst',74491104),

//    Series 16 : One-Inch Map of Scotland (3rd Edition)
    new square_sheet(16,1,3,-1003483,-171069,-1098523,-297789,'Kirkmaiden',74487493),
    new square_sheet(16,2,3,-1003483,-44349,-1098523,-171069,'Whithorn',74488551),
    new square_sheet(16,3,3,-908443,-171069,-1003483,-297789,'Stranraer',74488552),
    new square_sheet(16,4,3,-908443,-44349,-1003483,-171069,'Wigtown',74488557),
    new square_sheet(16,5,3,-908443,82371,-1003483,-44349,'Kirkcudbright',74488560),
    new square_sheet(16,6,3,-908443,209091,-1003483,82371,'Annan',74488563),
    new square_sheet(16,7,3,-813403,-171069,-908443,-297789,'Girvan',74488566),
    new square_sheet(16,8,3,-813403,-44349,-908443,-171069,'Carrick',74488569),
    new square_sheet(16,9,3,-813403,82371,-908443,-44349,'Maxwelltown',74488572),
    new square_sheet(16,10,3,-813403,209091,-908443,82371,'Dumfries',74488575),
    new square_sheet(16,11,3,-813403,335811,-908443,209091,'Langholm',74488578),
    new square_sheet(16,12,3,-718363,-297789,-813403,-424509,'Campbeltown',74488581),
    new square_sheet(16,13,3,-718363,-171069,-813403,-297789,'Arran',74488584),
    new square_sheet(16,14,3,-718363,-44349,-813403,-171069,'Ayr',74488587),
    new square_sheet(16,15,3,-718363,82371,-813403,-44349,'Sanquhar',74488590),
    new square_sheet(16,16,3,-718363,209091,-813403,82371,'Moffat',74488598),
    new square_sheet(16,17,3,-718363,335811,-813403,209091,'Jedburgh',74488601),
    new square_sheet(16,18,3,-718363,462531,-813403,335811,'Morebattle',74488683),
    new square_sheet(16,19,3,-623323,-424509,-718363,-551229,'Bowmore',74488604),
    new square_sheet(16,20,3,-623323,-297789,-718363,-424509,'Killean',74488607),
    new square_sheet(16,21,3,-623323,-171069,-718363,-297789,'Arran',74488610),
    new square_sheet(16,22,3,-623323,-44349,-718363,-171069,'Kilmarnock',74488613),
    new square_sheet(16,23,3,-623323,82371,-718363,-44349,'Hamilton',74488616),
    new square_sheet(16,24,3,-623323,209091,-718363,82371,'Peebles',74488619),
    new square_sheet(16,25,3,-623323,335811,-718363,209091,'Kelso',74488622),
    new square_sheet(16,26,3,-623323,462531,-718363,335811,'Berwick upon Tweed',74488625),
    new square_sheet(16,27,3,-528283,-424509,-623323,-551229,'Port Ascaig',74488628),
    new square_sheet(16,28,3,-528283,-297789,-623323,-424509,'Jura',74488680),
    new square_sheet(16,29,3,-528283,-171069,-623323,-297789,'Rothesay',74488686),
    new square_sheet(16,30,3,-528283,-44349,-623323,-171069,'Glasgow',74488690),
    new square_sheet(16,31,3,-528283,82371,-623323,-44349,'Airdrie',74488695),
    new square_sheet(16,32,3,-528283,209091,-623323,82371,'Edinburgh',74488703),
    new square_sheet(16,33,3,-528283,335811,-623323,209091,'Haddington',74488707),
    new square_sheet(16,34,3,-528283,462531,-623323,335811,'Eyemouth',74488712),
    new square_sheet(16,35,3,-433243,-424509,-528283,-551229,'Colonsay',74488715),
    new square_sheet(16,36,3,-433243,-297789,-528283,-424509,'Kilmartin',74488720),
    new square_sheet(16,37,3,-433243,-171069,-528283,-297789,'Inveraray',74488726),
    new square_sheet(16,38,3,-433243,-44349,-528283,-171069,'Loch Lomond',74488743),
    new square_sheet(16,39,3,-433243,82371,-528283,-44349,'Stirling',74489036),
    new square_sheet(16,40,3,-433243,209091,-528283,82371,'Kinross',74489039),
    new square_sheet(16,41,3,-433243,335811,-528283,209091,'North Berwick',74489042),
    new square_sheet(16,42,3,-338203,-551229,-433243,-677949,'Tiree',74489045),
    new square_sheet(16,43,3,-338203,-424509,-433243,-551229,'Iona',74489048),
    new square_sheet(16,44,3,-338203,-297789,-433243,-424509,'Mull',74489051),
    new square_sheet(16,45,3,-338203,-171069,-433243,-297789,'Oban',74489054),
    new square_sheet(16,46,3,-338203,-44349,-433243,-171069,'Balquhidder',74489057),
    new square_sheet(16,47,3,-338203,82371,-433243,-44349,'Crieff',74489060),
    new square_sheet(16,48,3,-338203,209091,-433243,82371,'Perth',74489063),
    new square_sheet(16,49,3,-338203,335811,-433243,209091,'Arbroath',74489066),
    new square_sheet(16,50,3,-243163,-551229,-338203,-677949,'',0),
    new square_sheet(16,51,3,-243163,-424509,-338203,-551229,'Coll',74489283),
    new square_sheet(16,52,3,-243163,-297789,-338203,-424509,'Tobermory',74489286),
    new square_sheet(16,53,3,-243163,-171069,-338203,-297789,'Ben Nevis',74490357),
    new square_sheet(16,54,3,-243163,-44349,-338203,-171069,'Rannoch',74490360),
    new square_sheet(16,55,3,-243163,82371,-338203,-44349,'Blair Atholl',74490363),
    new square_sheet(16,56,3,-243163,209091,-338203,82371,'Blairgowrie',74490366),
    new square_sheet(16,57,3,-243163,335811,-338203,209091,'Forfar',74490369),
    new square_sheet(16,58,3,-148123,-677949,-243163,-804669,'Barra',74490375),
    new square_sheet(16,59,3,-148123,-551229,-243163,-677949,'Gighay',74490378),
    new square_sheet(16,60,3,-148123,-424509,-243163,-551229,'Rum',74490381),
    new square_sheet(16,61,3,-148123,-297789,-243163,-424509,'Arisaig',74490384),
    new square_sheet(16,62,3,-148123,-171069,-243163,-297789,'Loch Eil',74490387),
    new square_sheet(16,63,3,-148123,-44349,-243163,-171069,'Glen Roy',74490390),
    new square_sheet(16,64,3,-148123,82371,-243163,-44349,'Kingussie',74490393),
    new square_sheet(16,65,3,-148123,209091,-243163,82371,'Balmoral',74490396),
    new square_sheet(16,66,3,-148123,335811,-243163,209091,'Banchory',74490399),
    new square_sheet(16,67,3,-148123,462531,-243163,335811,'Stonehaven',74490402),
    new square_sheet(16,68,3,-53083,-677949,-148123,-804669,'Fiaray',74490405),
    new square_sheet(16,69,3,-53083,-551229,-148123,-677949,'South Uist',74490408),
    new square_sheet(16,70,3,-53083,-424509,-148123,-551229,'Minginish',74490411),
    new square_sheet(16,71,3,-53083,-297789,-148123,-424509,'Glenelg',74490414),
    new square_sheet(16,72,3,-53083,-171069,-148123,-297789,'Cluanie',74490417),
    new square_sheet(16,73,3,-53083,-44349,-148123,-171069,'Fort Augustus',74490556),
    new square_sheet(16,74,3,-53083,82371,-148123,-44349,'Grantown',74490558),
    new square_sheet(16,75,3,-53083,209091,-148123,82371,'Tomintoul',74490562),
    new square_sheet(16,76,3,-53083,335811,-148123,209091,'Inverurie',74490565),
    new square_sheet(16,77,3,-53083,462531,-148123,335811,'Aberdeen',74490568),
    new square_sheet(16,78,3,41957,-677949,-53083,-804669,'Monach',74490571),
    new square_sheet(16,79,3,41957,-551229,-53083,-677949,'Benbecula',74490574),
    new square_sheet(16,80,3,41957,-424509,-53083,-551229,'Portree',74490577),
    new square_sheet(16,81,3,41957,-297789,-53083,-424509,'Applecross',74490580),
    new square_sheet(16,82,3,41957,-171069,-53083,-297789,'Lochcarron',74490583),
    new square_sheet(16,83,3,41957,-44349,-53083,-171069,'Inverness',74490586),
    new square_sheet(16,84,3,41957,82371,-53083,-44349,'Nairn',74490589),
    new square_sheet(16,85,3,41957,209091,-53083,82371,'Rothes',74490592),
    new square_sheet(16,86,3,41957,335811,-53083,209091,'Huntly',74490595),
    new square_sheet(16,87,3,41957,462531,-53083,335811,'Peterhead',74490598),
    new square_sheet(16,88,3,136997,-677949,41957,-804669,'Hougary',74490601),
    new square_sheet(16,89,3,136997,-551229,41957,-677949,'Sollas',74490604),
    new square_sheet(16,90,3,136997,-424509,41957,-551229,'Rudha Hunish',74490607),
    new square_sheet(16,91,3,136997,-297789,41957,-424509,'Gairloch',74490610),
    new square_sheet(16,92,3,136997,-171069,41957,-297789,'Inverbroom',74490613),
    new square_sheet(16,93,3,136997,-44349,41957,-171069,'Alness',74490616),
    new square_sheet(16,94,3,136997,82371,41957,-44349,'Cromarty',74490619),
    new square_sheet(16,95,3,136997,209091,41957,82371,'Elgin',74490622),
    new square_sheet(16,96,3,136997,335811,41957,209091,'Banff',74490625),
    new square_sheet(16,97,3,136997,462531,41957,335811,'Fraserburgh',74490628),
    new square_sheet(16,98,3,232037,-551229,136997,-677949,'Scarp',74490632),
    new square_sheet(16,99,3,232037,-424509,136997,-551229,'Tarbert',74490636),
    new square_sheet(16,100,3,232037,-297789,136997,-424509,'Achagarve',74490639),
    new square_sheet(16,101,3,232037,-171069,136997,-297789,'Ullapool',74490642),
    new square_sheet(16,102,3,232037,-44349,136997,-171069,'Lairg',74490645),
    new square_sheet(16,103,3,232037,82371,136997,-44349,'Golspie',74490648),
    new square_sheet(16,104,3,327077,-551229,232037,-677949,'Valtos',74490652),
    new square_sheet(16,105,3,327077,-424509,232037,-551229,'Stornoway',74490655),
    new square_sheet(16,106,3,327077,-297789,232037,-424509,'Portnaguiran',74490658),
    new square_sheet(16,107,3,327077,-171069,232037,-297789,'Lochinver',74490661),
    new square_sheet(16,108,3,327077,-44349,232037,-171069,'Altnaharra',74490664),
    new square_sheet(16,109,3,327077,82371,232037,-44349,'Auchintoul',74490667),
    new square_sheet(16,110,3,327077,209091,232037,82371,'Latheron',74490670),
    new square_sheet(16,111,3,422117,-424509,327077,-551229,'Butt of Lewis',74490673),
    new square_sheet(16,112,3,422117,-297789,327077,-424509,'Cellar Head',74490676),
    new square_sheet(16,113,3,422117,-171069,327077,-297789,'Cape Wrath',74491051),
    new square_sheet(16,114,3,422117,-44349,327077,-171069,'Tongue',74491054),
    new square_sheet(16,115,3,422117,82371,327077,-44349,'Reay',74491057),
    new square_sheet(16,116,3,422117,209091,327077,82371,'Wick',74491060),
    new square_sheet(16,117,3,517157,209091,422117,82371,'Hoy',74491063),
    new square_sheet(16,118,3,517157,335811,422117,209091,'Copinsay',74491066),
    new square_sheet(16,119,3,612197,209091,517157,82371,'Kirkwall',74491069),
    new square_sheet(16,120,3,612197,335811,517157,209091,'Stronsay',74491072),
    new square_sheet(16,121,3,707237,209091,612197,82371,'Westray',74491075),
    new square_sheet(16,122,3,707237,335811,612197,209091,'Sanday',74491078),
    new square_sheet(16,123,3,802277,462531,707237,335811,'Fair Isle',74491081),
    new square_sheet(16,124,3,897317,589251,802277,462531,'Sumburgh',74491084),
    new square_sheet(16,125,3,992357,462531,897317,335811,'Foula',74491087),
    new square_sheet(16,126,3,992357,589251,897317,462531,'Lerwick',74491090),
    new square_sheet(16,127,3,1087397,462531,992357,335811,'Sandness',74491093),
    new square_sheet(16,128,3,1087397,589251,992357,462531,'Whalsay',74491096),
    new square_sheet(16,129,3,1182437,462531,1087397,335811,'Hillswick',74491099),
    new square_sheet(16,130,3,1182437,589251,1087397,462531,'Yell',74491102),
    new square_sheet(16,131,3,1277477,589251,1182437,462531,'Unst',74491105),

//    Series 7 : One-Inch Popular Edition of Scotland
    new square_sheet(7,1,2,2794540,355350,2651980,260310,'Yell & Unst (Shetland Islands)',74400491),
    new square_sheet(7,2,2,2715340,355350,2604460,186390,'North Mainland (Shetland Islands)',74400492),
    new square_sheet(7,3,2,2609740,313110,2514700,170550,'Central Mainland (Shetland Islands)',74400493),
    new square_sheet(7,4,2,2556940,313110,2414380,218070,'South Mainland (Shetland Islands)',74400494),
    new square_sheet(7,5,2,2261260,59670,2139820,-82890,'Orkney Islands (North)',74400495),
    new square_sheet(7,6,2,2171500,27990,2060620,-140970,'Orkney Islands (Mainland)',74400496),
    new square_sheet(7,7,2,2065900,-14250,1970860,-156810,'Orkney Islands (South)',74400497),
    new square_sheet(7,8,2,1960300,-663690,1859980,-811530,'Butt of Lewis',74400498),
    new square_sheet(7,9,2,1997260,-373290,1849420,-489450,'Cape Wrath',74400499),
    new square_sheet(7,10,2,1970860,-246570,1849420,-394410,'Tongue',74400500),
    new square_sheet(7,11,2,1997260,-151530,1849420,-251850,'Thurso & Reay',74400501),
    new square_sheet(7,12,2,1997260,-61770,1849420,-156810,'Wick',74400526),
    new square_sheet(7,13,2,1865260,-769290,1722700,-869610,'Loch Roag & Tarbert',74400527),
    new square_sheet(7,14,2,1865260,-663690,1722700,-774570,'Stornoway',74400528),
    new square_sheet(7,15,2,1854700,-404970,1754380,-552810,'Lochinver & Loch Assynt',74400531),
    new square_sheet(7,16,2,1854700,-262410,1754380,-410250,'Lairg & Loch Shin',74400532),
    new square_sheet(7,17,2,1854700,-125130,1754380,-267690,'Helmsdale',74400533),
    new square_sheet(7,18,2,1759660,-727050,1659340,-869610,'Harris',74400535),
    new square_sheet(7,19,2,1759660,-468330,1659340,-616170,'Ullapool & Loch Ewe',74400536),
    new square_sheet(7,20,2,1759660,-331050,1659340,-473610,'Strath Oykell',74400538),
    new square_sheet(7,21,2,1759660,-214890,1659340,-357450,'Dornoch',74400539),
    new square_sheet(7,22,2,1712140,-853770,1611820,-996330,'Sollas',74400540),
    new square_sheet(7,23,2,1617100,-853770,1516780,-996330,'Benbecula',74400541),
    new square_sheet(7,24,2,1664620,-674250,1516780,-806250,'Portree & Dunvegan',74400581),
    new square_sheet(7,25,2,1664620,-568650,1516780,-690090,'Raasay & Applecross',74400582),
    new square_sheet(7,26,2,1664620,-426090,1564300,-573930,'Loch Maree & Achnasheen',74400583),
    new square_sheet(7,27,2,1664620,-283530,1564300,-431370,'Strathpeffer & Invergordon',74400584),
    new square_sheet(7,28,2,1664620,-140970,1564300,-288810,'Nairn & Cromarty',74400585),
    new square_sheet(7,29,2,1664620,1590,1564300,-146250,'Elgin & Keith',74400588),
    new square_sheet(7,30,2,1664620,138870,1564300,-3690,'Banff & Fraserburgh',74400595),
    new square_sheet(7,31,2,1638220,186390,1495660,86070,'Peterhead',74400597),
    new square_sheet(7,32,2,1522060,-853770,1427020,-996330,'Lochboisdale & Eriskay',74400598),
    new square_sheet(7,33,2,1437580,-853770,1331980,-996330,'Barra & Mingulay',74400600),
    new square_sheet(7,34,2,1522060,-684810,1374220,-785130,'The Cuillins, Rhum & Canna',74400601),
    new square_sheet(7,35,2,1522060,-568650,1374220,-690090,'Sound of Sleat',74400627),
    new square_sheet(7,36,2,1569580,-426090,1469260,-573930,'Lochcarron & Dornie',74400629),
    new square_sheet(7,37,2,1569580,-283530,1469260,-431370,'Inverness',74400630),
    new square_sheet(7,38,2,1569580,-140970,1469260,-288810,'Granton-on-Spey & Strath Dearn',74400633),
    new square_sheet(7,39,2,1569580,1590,1469260,-146250,'Dufftown & Huntly',74400634),
    new square_sheet(7,40,2,1569580,138870,1469260,-3690,'Inverurie & Ellon',74400635),
    new square_sheet(7,41,2,1474540,-426090,1374220,-573930,'Glen Shiel & Glen Garry',74400637),
    new square_sheet(7,42,2,1474540,-283530,1374220,-431370,'Fort Augustus',74400639),
    new square_sheet(7,43,2,1474540,-140970,1374220,-288810,'Kingussie',74400640),
    new square_sheet(7,44,2,1474540,1590,1374220,-146250,'Ballater & Strathdon',74400641),
    new square_sheet(7,45,2,1474540,138870,1374220,-3690,'Aberdeen',74400642),
    new square_sheet(7,46,2,1379500,-568650,1273900,-716490,'Ardnamurchan & Loch Shiel',74400646),
    new square_sheet(7,47,2,1379500,-426090,1273900,-573930,'Ben Nevis & Fort William',74400654),
    new square_sheet(7,48,2,1379500,-283530,1279180,-431370,'Loch Ericht & Loch Laggan',74400655),
    new square_sheet(7,49,2,1379500,-140970,1279180,-288810,'Grampian Mountains & Blair Atholl',74400659),
    new square_sheet(7,50,2,1379500,-3690,1279180,-146250,'Glen Clova & Lochnagar',74400664),
    new square_sheet(7,51,2,1379500,107190,1279180,-35370,'Stonehaven & Brechin',74400665),
    new square_sheet(7,52,2,1289740,-732330,1189420,-880170,'Coll & Tiree',74400667),
    new square_sheet(7,53,2,1284460,-568650,1184140,-737610,'Sound of Mull',74400669),
    new square_sheet(7,54,2,1284460,-426090,1184140,-573930,'Loch Etive & Glen Coe',74400670),
    new square_sheet(7,55,2,1284460,-283530,1184140,-431370,'Killin & Loch Rannoch',74400672),
    new square_sheet(7,56,2,1284460,-140970,1184140,-288810,'Dunkeld & Pitlochry',74400673),
    new square_sheet(7,57,2,1284460,-3690,1178860,-146250,'Forfar & Dundee',74400674),
    new square_sheet(7,58,2,1284460,54390,1178860,-93450,'Arbroath & Montrose',74400675),
    new square_sheet(7,59,2,1189420,-663690,1025740,-764010,'Iona & Colonsay',74400676),
    new square_sheet(7,60,2,1189420,-568650,1025740,-668970,'North Jura & Firth of Lorne',74400677),
    new square_sheet(7,61,2,1189420,-426090,1089100,-573930,'Oban & Loch Awe',74400678),
    new square_sheet(7,62,2,1189420,-283530,1089100,-431370,'Loch Katrine & Loch Earn',74400679),
    new square_sheet(7,63,2,1189420,-146250,1089100,-288810,'Perth & Strath Earn',74400680),
    new square_sheet(7,64,2,1199980,22710,1089100,-156810,'Dundee & St Andrews',74400681),
    new square_sheet(7,65,2,1094380,-426090,999340,-573930,'Dunoon & Loch Fyne',74400682),
    new square_sheet(7,66,2,1094380,-283530,999340,-431370,'Loch Lomond',74400683),
    new square_sheet(7,67,2,1094380,-146250,999340,-288810,'Stirling & Dunfermline',74400684),
    new square_sheet(7,68,2,1094380,22710,988780,-156810,'Firth of Forth',74400715),
    new square_sheet(7,69,2,1031020,-663690,872620,-795690,'Islay',74400685),
    new square_sheet(7,70,2,1031020,-568650,872620,-668970,'Sound of Jura',74400698),
    new square_sheet(7,71,2,1025740,-431370,904300,-573930,'Island of Bute',74400699),
    new square_sheet(7,72,2,1025740,-283530,899020,-463050,'Glasgow',74400707),
    new square_sheet(7,73,2,1025740,-140970,899020,-288810,'Falkirk & Motherwell',74400709),
    new square_sheet(7,74,2,1025740,1590,899020,-146250,'Edinburgh',74400710),
    new square_sheet(7,75,2,1025740,138870,899020,-3690,'Dunbar & Lammermuir',74400711),
    new square_sheet(7,76,2,930700,-526410,751180,-653130,'Kintyre',74400713),
    new square_sheet(7,77,2,930700,-426090,803980,-573930,'Island of Arran',74400716),
    new square_sheet(7,78,2,904300,-283530,803980,-431370,'Kilmarnock & Ayr',74400717),
    new square_sheet(7,79,2,904300,-140970,803980,-288810,'Lanark',74400718),
    new square_sheet(7,80,2,904300,1590,803980,-146250,'Peebles & Galashiels',74400719),
    new square_sheet(7,81,2,904300,138870,803980,-3690,'Kelso & The Cheviot',74400720),
    new square_sheet(7,82,2,809260,-426090,661420,-526410,'Ailsa Craig & Girvan',74400721),
    new square_sheet(7,83,2,809260,-283530,708940,-431370,'Loch Doon',74400722),
    new square_sheet(7,84,2,809260,-140970,708940,-288810,'Nithsdale & Moffat',74400723),
    new square_sheet(7,85,2,809260,1590,708940,-146250,'Hawick & Eskdale',74400724),
    new square_sheet(7,86,2,809260,138870,714220,-3690,'The Cheviot Hills',74400725),
    new square_sheet(7,87,2,714220,-283530,613900,-431370,'Newton Stewart',74400726),
    new square_sheet(7,88,2,714220,-140970,619180,-288810,'Dumfries',74400727),
    new square_sheet(7,89,2,714220,-3690,619180,-146250,'Solway Firth & River Esk',74400728),
    new square_sheet(7,90,2,666700,-426090,518860,-531690,'Stranraer',74400729),
    new square_sheet(7,91,2,619180,-288810,524140,-431370,'Wigtown',74400730),
    new square_sheet(7,92,2,661420,-177930,566380,-346890,'Castle Douglas & Kirkcudbright',74400731),
// Inserts
    new square_sheet(7,2,1,1166,412,1165,409,'Yell & Unst (Shetland Islands)',74400492),
    new square_sheet(7,3,1,1142,400,1136,393,'Central Mainland (Shetland Islands)',74400493),
    new square_sheet(7,4,1,1075,425,1068,418,'South Mainland (Shetland Islands)',74400494),
    new square_sheet(7,8,1,1034,183,1031,180,'Butt of Lewis',74400498),
    new square_sheet(7,8,1,1031,164,1029,160,'Butt of Lewis',74400498),
    new square_sheet(7,8,1,948,75,944,68,'Butt of Lewis',74400498),
    new square_sheet(7,22,1,907,16,896,5,'Sollas',74400540),
    new square_sheet(7,34,1,797,117,795,115,'The Cuillins, Rhum & Canna',74400601),
    new square_sheet(7,46,1,782,140,778,139,'Ardnamurchan & Loch Shiel',74400646),
    new square_sheet(7,66,1,675,242,674,238,'Loch Lomond',74400683),
     new square_sheet(7,68,2,1085560,29139,1070077,22710,'Firth of Forth',74400715),
    new square_sheet(7,74,1,682,313,680,312,'Edinburgh',74400710),
    new square_sheet(7,75,1,655,401,650,399,'Dunbar & Lammermuir',74400711),
   
//    Series 8 : One-Inch Seventh Series
    new square_sheet(8,1,1,1220,470,1175,430,'Shetland Islands (Yell & Unst)'),
    new square_sheet(8,2,1,1190,450,1145,410,'Shetland Islands (North Mainland)'),
    new square_sheet(8,3,1,1175,470,1130,430,'Shetland Islands (Lerwick)'),
    new square_sheet(8,4,1,1150,460,1105,420,'Shetland Islands (South Mainland)'),
    new square_sheet(8,5,1,1060,379,1015,339,'Orkney Islands (North)'),
    new square_sheet(8,6,1,1040,361,995,321,'Orkney Islands (Kirkwall)'),
    new square_sheet(8,7,1,1006,350,961,310,'Pentland Firth'),
    new square_sheet(8,8,1,970,158,925,118,'Isle of Lewis (Stornoway)'),
    new square_sheet(8,9,1,980,250,935,210,'Cape Wrath'),
    new square_sheet(8,10,1,980,290,935,250,'Tongue'),
    new square_sheet(8,11,1,980,330,935,290,'Thurso'),
    new square_sheet(8,12,1,945,130,900,90,'Isle of Lewis & North Harris'),
    new square_sheet(8,13,1,945,235,900,195,'Loch Inver & Loch Assynt'),
    new square_sheet(8,14,1,945,275,900,235,'Lairg'),
    new square_sheet(8,15,1,945,305,900,265,'Helmsdale'),
    new square_sheet(8,16,1,961,340,916,300,'Wick'),
    new square_sheet(8,17,1,903,105,858,65,'North Uist'),
    new square_sheet(8,18,1,925,145,880,105,'Harris'),
    new square_sheet(8,19,1,910,210,865,170,'Gairloch'),
    new square_sheet(8,20,1,910,235,865,195,'Ullapool'),
    new square_sheet(8,21,1,910,275,865,235,'Bonar-Bridge'),
    new square_sheet(8,22,1,910,300,865,260,'Dornoch'),
    new square_sheet(8,23,1,865,95,820,55,'South Uist'),
    new square_sheet(8,24,1,880,153,835,113,'North Skye'),
    new square_sheet(8,25,1,865,180,820,140,'Portree'),
    new square_sheet(8,26,1,865,215,820,175,'Lochcarron'),
    new square_sheet(8,27,1,865,255,820,215,'Strathpeffer'),
    new square_sheet(8,28,1,865,295,820,255,'Inverness'),
    new square_sheet(8,29,1,875,335,830,295,'Elgin'),
    new square_sheet(8,30,1,875,375,830,335,'Banff'),
    new square_sheet(8,31,1,875,415,830,375,'Peterhead'),
    new square_sheet(8,32,1,820,90,775,50,'Barra'),
    new square_sheet(8,33,1,835,153,790,113,'Rhum and part of Skye'),
    new square_sheet(8,34,1,820,175,775,135,'South Skye & Arisaig'),
    new square_sheet(8,35,1,820,215,775,175,'Loch Arkaig'),
    new square_sheet(8,36,1,820,255,775,215,'Fort Augustus'),
    new square_sheet(8,37,1,820,295,775,255,'Kingussie'),
    new square_sheet(8,38,1,835,335,790,295,'Grantown and Cairngorm'),
    new square_sheet(8,39,1,835,365,790,325,'Strathdon'),
    new square_sheet(8,40,1,835,405,790,365,'Aberdeen'),
    new square_sheet(8,41,1,815,335,770,295,'Braemar'),
    new square_sheet(8,42,1,815,365,770,325,'Ballater'),
    new square_sheet(8,43,1,795,395,750,355,'Stonehaven'),
    new square_sheet(8,44,1,775,133,730,93,'Coll & Tiree'),
    new square_sheet(8,45,1,775,173,730,133,'Sound of Mull'),
    new square_sheet(8,46,1,775,213,730,173,'Loch Linnhe'),
    new square_sheet(8,47,1,775,253,730,213,'Glen Coe'),
    new square_sheet(8,48,1,775,293,730,253,'Loch Tay'),
    new square_sheet(8,49,1,775,333,730,293,'Blairgowrie'),
    new square_sheet(8,50,1,770,373,725,333,'Forfar'),
    new square_sheet(8,51,1,730,165,685,125,'Iona & Colonsay'),
    new square_sheet(8,52,1,730,205,685,165,'Loch Awe'),
    new square_sheet(8,53,1,730,245,685,205,'Loch Lomond'),
    new square_sheet(8,54,1,730,285,685,245,'Stirling'),
    new square_sheet(8,55,1,730,325,685,285,'Perth & Alloa'),
    new square_sheet(8,56,1,730,365,685,325,'St Andrews and Kirkcaldy'),
    new square_sheet(8,57,1,685,155,640,115,'Islay'),
    new square_sheet(8,58,1,685,195,640,155,'Knapdale'),
    new square_sheet(8,59,1,685,235,640,195,'Firth of Clyde'),
    new square_sheet(8,60,1,685,270,640,230,'Glasgow'),
    new square_sheet(8,61,1,685,310,640,270,'Falkirk & Lanark'),
    new square_sheet(8,62,1,685,350,640,310,'Edinburgh'),
    new square_sheet(8,63,1,685,390,640,350,'Dunbar'),
    new square_sheet(8,64,1,675,415,630,375,'Berwick-upon-Tweed'),
    new square_sheet(8,65,1,645,195,600,155,'Kintyre'),
    new square_sheet(8,66,1,660,220,615,180,'Island of Arran'),
    new square_sheet(8,67,1,640,270,595,230,'Ayr'),
    new square_sheet(8,68,1,640,310,595,270,'Biggar, Moffat and Sanquhar'),
    new square_sheet(8,69,1,640,350,595,310,'Selkirk'),
    new square_sheet(8,70,1,640,390,595,350,'Jedburgh'),
    new square_sheet(8,71,1,640,430,595,390,'Alnwick'),
    new square_sheet(8,72,1,620,235,575,195,'Girvan'),
    new square_sheet(8,73,1,595,270,550,230,'New Galloway'),
    new square_sheet(8,74,1,595,310,550,270,'Dumfries'),
    new square_sheet(8,75,1,595,333,550,293,'Dumfries & Gretna'),
    new square_sheet(8,76,1,595,373,550,333,'Carlisle'),
    new square_sheet(8,77,1,595,413,550,373,'Hexham'),
    new square_sheet(8,78,1,595,443,550,403,'Newcastle upon Tyne'),
    new square_sheet(8,79,1,575,235,530,195,'Stranraer'),
    new square_sheet(8,80,1,575,270,530,230,'Kirkcudbright'),
    new square_sheet(8,81,1,575,310,530,270,'Dalbeattie'),
    new square_sheet(8,82,1,550,333,505,293,'Keswick'),
    new square_sheet(8,83,1,550,373,505,333,'Penrith'),
    new square_sheet(8,84,1,550,413,505,373,'Teesdale'),
    new square_sheet(8,85,1,550,453,505,413,'Durham'),
    new square_sheet(8,86,1,530,493,485,453,'Redcar & Whitby'),
    new square_sheet(8,87,1,507,252,462,212,'Isle of Man'),
    new square_sheet(8,88,1,505,340,460,300,'Barrow in Furness'),
    new square_sheet(8,89,1,505,370,460,330,'Lancaster and Kendal'),
    new square_sheet(8,90,1,505,410,460,370,'Wensleydale'),
    new square_sheet(8,91,1,505,450,460,410,'Ripon'),
    new square_sheet(8,92,1,505,490,460,450,'Pickering'),
    new square_sheet(8,93,1,510,527,465,487,'Scarborough'),
    new square_sheet(8,94,1,465,370,420,330,'Preston'),
    new square_sheet(8,95,1,460,400,415,360,'Blackburn & Burnley'),
    new square_sheet(8,96,1,460,440,415,400,'Leeds & Bradford'),
    new square_sheet(8,97,1,465,480,420,440,'York'),
    new square_sheet(8,98,1,465,500,420,460,'Market Weighton'),
    new square_sheet(8,99,1,465,540,420,500,'Hull'),
    new square_sheet(8,100,1,420,360,375,320,'Liverpool'),
    new square_sheet(8,101,1,420,400,375,360,'Manchester'),
    new square_sheet(8,102,1,430,440,385,400,'Huddersfield'),
    new square_sheet(8,103,1,420,475,375,435,'Doncaster'),
    new square_sheet(8,104,1,420,515,375,475,'Gainsborough'),
    new square_sheet(8,105,1,420,555,375,515,'Grimsby'),
    new square_sheet(8,106,1,398,261,353,221,'Anglesey'),
    new square_sheet(8,107,1,385,288,340,248,'Snowdon'),
    new square_sheet(8,108,1,385,328,340,288,'Denbigh'),
    new square_sheet(8,109,1,390,360,345,320,'Chester'),
    new square_sheet(8,110,1,375,400,330,360,'Stoke on Trent'),
    new square_sheet(8,111,1,390,440,345,400,'Buxton & Matlock'),
    new square_sheet(8,112,1,375,480,330,440,'Nottingham'),
    new square_sheet(8,113,1,375,520,330,480,'Lincoln & Grantham'),
    new square_sheet(8,114,1,375,560,330,520,'Boston & Skegness'),
    new square_sheet(8,115,1,365,250,320,210,'Pwllheli'),
    new square_sheet(8,116,1,353,288,308,248,'Dolgellau'),
    new square_sheet(8,117,1,345,328,300,288,'Bala & Welshpool'),
    new square_sheet(8,118,1,345,368,300,328,'Shrewsbury'),
    new square_sheet(8,119,1,345,400,300,360,'Stafford'),
    new square_sheet(8,120,1,345,440,300,400,'Burton upon Trent'),
    new square_sheet(8,121,1,345,468,300,428,'Derby & Leicester'),
    new square_sheet(8,122,1,345,495,300,455,'Melton Mowbray'),
    new square_sheet(8,123,1,345,535,300,495,'Spalding'),
    new square_sheet(8,124,1,345,575,300,535,'Kings Lynn'),
    new square_sheet(8,125,1,347,615,302,575,'Fakenham'),
    new square_sheet(8,126,1,347,655,302,615,'Norwich'),
    new square_sheet(8,127,1,308,288,263,248,'Aberystwyth'),
    new square_sheet(8,128,1,300,328,255,288,'Montgomery and Llandrindod Wells'),
    new square_sheet(8,129,1,300,368,255,328,'Ludlow'),
    new square_sheet(8,130,1,300,400,255,360,'Kidderminster'),
    new square_sheet(8,131,1,300,428,255,388,'Birmingham'),
    new square_sheet(8,132,1,300,468,255,428,'Coventry & Rugby'),
    new square_sheet(8,133,1,300,495,255,455,'Northampton'),
    new square_sheet(8,134,1,300,535,255,495,'Huntingdon & Peterborough'),
    new square_sheet(8,135,1,300,575,255,535,'Cambridge & Ely'),
    new square_sheet(8,136,1,302,615,257,575,'Bury St Edmunds'),
    new square_sheet(8,137,1,302,655,257,615,'Lowestoft'),
    new square_sheet(8,138,1,250,208,205,168,'Fishguard'),
    new square_sheet(8,139,1,264,248,218,208,'Cardigan'),
    new square_sheet(8,140,1,263,288,218,248,'Llandovery'),
    new square_sheet(8,141,1,255,328,210,288,'Brecon'),
    new square_sheet(8,142,1,255,368,210,328,'Hereford'),
    new square_sheet(8,143,1,255,400,210,360,'Gloucester & Malvern'),
    new square_sheet(8,144,1,255,428,210,388,'Cheltenham & Evesham'),
    new square_sheet(8,145,1,255,468,210,428,'Banbury'),
    new square_sheet(8,146,1,255,495,210,455,'Buckingham'),
    new square_sheet(8,147,1,255,535,210,495,'Bedford & Luton'),
    new square_sheet(8,148,1,255,575,210,535,'Saffron Walden'),
    new square_sheet(8,149,1,257,610,212,570,'Colchester'),
    new square_sheet(8,150,1,257,650,212,610,'Ipswich'),
    new square_sheet(8,151,1,235,208,190,168,'Pembroke'),
    new square_sheet(8,152,1,225,248,180,208,'Carmarthen and Tenby'),
    new square_sheet(8,153,1,218,288,173,248,'Swansea'),
    new square_sheet(8,154,1,210,328,165,288,'Cardiff'),
    new square_sheet(8,155,1,210,368,165,328,'Bristol & Newport'),
    new square_sheet(8,156,1,210,393,165,353,'Bristol & Stroud'),
    new square_sheet(8,157,1,210,428,165,388,'Swindon'),
    new square_sheet(8,158,1,210,468,165,428,'Oxford & Newbury'),
    new square_sheet(8,159,1,218,503,173,463,'The Chilterns'),
    new square_sheet(8,160,1,225,535,180,495,'London NW'),
    new square_sheet(8,161,1,215,575,170,535,'London NE'),
    new square_sheet(8,162,1,225,610,180,570,'Southend-on-Sea'),
    new square_sheet(8,163,1,155,280,110,240,'Barnstaple'),
    new square_sheet(8,164,1,155,320,110,280,'Minehead'),
    new square_sheet(8,165,1,175,360,130,320,'Weston-super-Mare'),
    new square_sheet(8,166,1,165,393,120,353,'Frome'),
    new square_sheet(8,167,1,165,428,120,388,'Salisbury'),
    new square_sheet(8,168,1,165,468,120,428,'Winchester'),
    new square_sheet(8,169,1,173,505,128,463,'Aldershot'),
    new square_sheet(8,170,1,180,535,135,495,'London SW'),
    new square_sheet(8,171,1,180,575,135,535,'London SE'),
    new square_sheet(8,172,1,180,610,135,570,'Chatham & Maidstone'),
    new square_sheet(8,173,1,173,642,128,602,'East Kent'),
    new square_sheet(8,174,1,125,240,80,200,'Bude'),
    new square_sheet(8,175,1,115,280,70,240,'Okehampton'),
    new square_sheet(8,176,1,115,320,70,280,'Exeter'),
    new square_sheet(8,177,1,130,360,85,320,'Taunton & Lyme Regis'),
    new square_sheet(8,178,1,120,393,75,353,'Dorchester'),
    new square_sheet(8,179,1,120,428,75,388,'Bournemouth'),
    new square_sheet(8,180,1,120,468,75,428,'The Solent'),
    new square_sheet(8,181,1,135,503,90,463,'Chichester'),
    new square_sheet(8,182,1,145,535,100,495,'Brighton  & Worthing'),
    new square_sheet(8,183,1,138,575,93,535,'Eastbourne'),
    new square_sheet(8,184,1,150,610,105,570,'Hastings'),
    new square_sheet(8,185,1,95,210,50,170,'Newquay & Padstow'),
    new square_sheet(8,186,1,90,240,45,200,'Bodmin & Launceston'),
    new square_sheet(8,187,1,80,280,35,240,'Plymouth'),
    new square_sheet(8,188,1,80,300,35,260,'Torbay'),
    new square_sheet(8,189,1,55,170,10,130,'Lands End'),
    new square_sheet(8,190,1,55,210,10,170,'Truro & Falmouth'),
//    Inserts
    new square_sheet(8,4,1,1143,400,1135,392,'Shetland Islands (South Mainland)'),
    new square_sheet(8,4,1,1076,425,1068,417,'Shetland Islands (South Mainland)'),
    new square_sheet(8,8,1,1035,184,1030,179,'Isle of Lewis (Stornoway)'),
    new square_sheet(8,8,1,1033,164,1028,159,'Isle of Lewis (Stornoway)'),
    new square_sheet(8,12,1,948,76,944,67,'Isle of Lewis & North Harris'),
    new square_sheet(8,12,1,913,90,910,86,'Isle of Lewis & North Harris'),
    new square_sheet(8,17,1,907,17,896,5,'North Uist'),
    new square_sheet(8,17,1,884,64,880,59,'North Uist'),
    new square_sheet(8,106,1,383,266,361,261,'Anglesey'),
    new square_sheet(8,137,1,297,656,292,655,'Lowestoft'),
    new square_sheet(8,138,1,229,168,222,165,'Fishguard'),
    new square_sheet(8,151,1,229,168,222,165,'Pembroke'),
    new square_sheet(8,151,1,210,161,206,146,'Pembroke'),
    new square_sheet(8,163,1,149,215,143,212,'Barnstaple'),
    new square_sheet(8,178,1,75,371,68,367,'Dorchester'),
    new square_sheet(8,181,1,102,463,98,462,'Chichester'),
    new square_sheet(8,182,1,95,500,100,495,'Brighton  & Worthing'),
    new square_sheet(8,189,1,18,96,5,80,'Lands End'),

//    Series 9 : 1:50000 Landranger
    new square_sheet(9,1,1,1220,469,1180,429,'Shetland - Yell, Unst & Fetlar'),
    new square_sheet(9,2,1,1196,473,1156,433,'Sheltland - Whalsay'),
    new square_sheet(9,3,1,1187,454,1147,414,'Sheltand - North Mainland'),
    new square_sheet(9,4,1,1147,460,1107,420,'Shetland - South Mainland'),
    new square_sheet(9,5,1,1060,380,1020,340,'Orkney - Northern Isles'),
    new square_sheet(9,6,1,1036,361,996,321,'Orkney - Mainland'),
    new square_sheet(9,7,1,1010,355,970,315,'Orkney - Southern Isles'),
    new square_sheet(9,8,1,966,157,926,117,'Stornoway & North Lewis'),
    new square_sheet(9,9,1,980,252,940,212,'Cape Wrath'),
    new square_sheet(9,10,1,980,292,940,252,'Strathnaver'),
    new square_sheet(9,11,1,969,332,929,292,'Thurso & Dunbeath'),
    new square_sheet(9,12,1,979,340,939,300,'Thurso & Wick'),
    new square_sheet(9,13,1,943,135,903,95,'West Lewis & North Harris'),
    new square_sheet(9,14,1,926,145,886,105,'Tarbert & Loch Seaforth'),
    new square_sheet(9,15,1,940,236,900,196,'Loch Assynt'),
    new square_sheet(9,16,1,940,276,900,236,'Lairg & Loch Shin'),
    new square_sheet(9,17,1,940,316,900,276,'Helmsdale & Strath of Kildonan'),
    new square_sheet(9,18,1,903,109,863,69,'South of Harris & St Kilda'),
    new square_sheet(9,19,1,900,214,860,174,'Gairloch & Ullapool'),
    new square_sheet(9,20,1,900,254,860,214,'Beinn Dearg'),
    new square_sheet(9,21,1,900,294,860,254,'Dornoch  & Alness'),
    new square_sheet(9,22,1,863,97,823,57,'Benbecula & South Uist'),
    new square_sheet(9,23,1,876,153,836,113,'North Skye'),
    new square_sheet(9,24,1,870,190,830,150,'Raasay & Loch Torridon'),
    new square_sheet(9,25,1,860,230,820,190,'Glen Carron'),
    new square_sheet(9,26,1,860,270,820,230,'Inverness & Strathglass'),
    new square_sheet(9,27,1,870,310,830,270,'Nairn & Forres'),
    new square_sheet(9,28,1,873,350,833,310,'Elgin & Dufftown'),
    new square_sheet(9,29,1,870,385,830,345,'Banff & Huntly'),
    new square_sheet(9,30,1,870,417,830,377,'Fraserburgh'),
    new square_sheet(9,31,1,823,90,783,50,'Barra & South Uist'),
    new square_sheet(9,32,1,840,170,800,130,'South Skye'),
    new square_sheet(9,33,1,830,210,790,170,'Loch Alsh & Glen Shiel'),
    new square_sheet(9,34,1,820,250,780,210,'Fort Augustus & Glen Albyn'),
    new square_sheet(9,35,1,830,290,790,250,'Kingussie'),
    new square_sheet(9,36,1,833,325,793,285,'Grantown, Aviemore & Cairngorm'),
    new square_sheet(9,37,1,833,365,793,325,'Strathdon'),
    new square_sheet(9,38,1,830,405,790,365,'Aberdeen'),
    new square_sheet(9,39,1,810,160,770,120,'Rhum & Eigg'),
    new square_sheet(9,40,1,800,200,760,160,'Loch Shiel'),
    new square_sheet(9,41,1,790,240,750,200,'Ben Nevis, Fort William'),
    new square_sheet(9,42,1,790,280,750,240,'Glen Garry & Loch Rannoch'),
    new square_sheet(9,43,1,800,320,760,280,'Braemar to Bliar Atholl'),
    new square_sheet(9,44,1,800,360,760,320,'Ballater, Glen Clova'),
    new square_sheet(9,45,1,800,400,760,360,'Stonehaven'),
    new square_sheet(9,46,1,773,132,733,92,'Coll & Tiree'),
    new square_sheet(9,47,1,773,160,733,120,'Tobermory & North Mull'),
    new square_sheet(9,48,1,750,160,710,120,'Iona, Ulva & west Mull'),
    new square_sheet(9,49,1,760,200,720,160,'Oban & East Mull'),
    new square_sheet(9,50,1,750,240,710,200,'Glen Orchy'),
    new square_sheet(9,51,1,760,280,720,240,'Loch Tay'),
    new square_sheet(9,52,1,760,310,720,270,'Aberfeldy & Glen Almond'),
    new square_sheet(9,53,1,760,334,720,294,'Blairgowrie'),
    new square_sheet(9,54,1,760,374,720,334,'Dundee to Montrose'),
    new square_sheet(9,55,1,720,204,680,164,'Lochgilphead & Loch Awe'),
    new square_sheet(9,56,1,722,244,682,204,'Loch Lomond & Inveraray'),
    new square_sheet(9,57,1,722,284,682,244,'Stirling & The Trossachs'),
    new square_sheet(9,58,1,730,324,690,284,'Perth & Kinross'),
    new square_sheet(9,59,1,730,364,690,324,'St Andrews Kirkcaldy & Glenrothes'),
    new square_sheet(9,60,1,680,150,640,110,'Islay'),
    new square_sheet(9,61,1,702,171,662,131,'Jura & Colonsay'),
    new square_sheet(9,62,1,680,200,640,160,'North Kintyre'),
    new square_sheet(9,63,1,682,240,642,200,'Firth of Clyde Greenock & Rothesay'),
    new square_sheet(9,64,1,685,280,645,240,'Glasgow Motherwell & Airdrie'),
    new square_sheet(9,65,1,690,320,650,280,'Falkirk & West Lothian'),
    new square_sheet(9,66,1,690,356,650,316,'Edinburgh Penicuik & North Berwick'),
    new square_sheet(9,67,1,690,396,650,356,'Duns Dunbar & Eyemouth'),
    new square_sheet(9,68,1,640,197,600,157,'South Kintyre'),
    new square_sheet(9,69,1,653,215,613,175,'Isle of Arran'),
    new square_sheet(9,70,1,645,255,605,215,'Ayr & Kilmarnock'),
    new square_sheet(9,71,1,645,295,605,255,'Lanark & Uper Nithsdale'),
    new square_sheet(9,72,1,660,320,620,280,'Upper Clyde Valley'),
    new square_sheet(9,73,1,660,360,620,320,'Peebles Galashiels & Selkirk'),
    new square_sheet(9,74,1,660,397,620,357,'Kelso'),
    new square_sheet(9,75,1,660,430,620,390,'Berwick-upon-Tweed'),
    new square_sheet(9,76,1,610,235,570,195,'Girvan'),
    new square_sheet(9,77,1,610,275,570,235,'Dalmellington to New Galloway'),
    new square_sheet(9,78,1,620,315,580,275,'Nithsdale & Lowther Hills'),
    new square_sheet(9,79,1,620,355,580,315,'Hawick & Eskdale'),
    new square_sheet(9,80,1,620,395,580,355,'Cheviot Hills & Keilder Forest'),
    new square_sheet(9,81,1,620,435,580,395,'Alnwick & Morpeth'),
    new square_sheet(9,82,1,570,235,530,195,'Stranraer & Glenluce'),
    new square_sheet(9,83,1,570,275,530,235,'NewtonStewart & Kirkcudbright'),
    new square_sheet(9,84,1,580,305,540,265,'Dumfries & Castle Douglas'),
    new square_sheet(9,85,1,580,345,540,305,'Carlisle & Solway Firth'),
    new square_sheet(9,86,1,580,385,540,345,'Haltwistle Bewcastle & Alston'),
    new square_sheet(9,87,1,580,407,540,367,'Hexham & Haltwistle'),
    new square_sheet(9,88,1,580,447,540,407,'Tyneside'),
    new square_sheet(9,89,1,540,330,500,290,'West Cumbria'),
    new square_sheet(9,90,1,540,357,500,317,'Penrith Keswick & Ambleside'),
    new square_sheet(9,91,1,540,397,500,357,'Appleby-in-Westmorland'),
    new square_sheet(9,92,1,540,420,500,380,'Barnard Castle '),
    new square_sheet(9,93,1,540,460,500,420,'Cleveland & Darlington'),
    new square_sheet(9,94,1,525,500,485,460,'Whitby'),
    new square_sheet(9,95,1,505,253,465,213,'Isle of Man'),
    new square_sheet(9,96,1,500,343,460,303,'Barrow-in-Furness & South Lakeland'),
    new square_sheet(9,97,1,500,366,460,326,'Kendal & Morecambe'),
    new square_sheet(9,98,1,500,406,460,366,'Wensleydale & Wharfedale'),
    new square_sheet(9,99,1,500,446,460,406,'Northallerton & Ripon'),
    new square_sheet(9,100,1,500,486,460,446,'Malton & Pickering'),
    new square_sheet(9,101,1,500,526,460,486,'Scarborough'),
    new square_sheet(9,102,1,460,366,420,326,'Preston & Blackpool'),
    new square_sheet(9,103,1,460,400,420,360,'Blackburn & Burnley'),
    new square_sheet(9,104,1,460,440,420,400,'Leeds & Bradford'),
    new square_sheet(9,105,1,460,480,420,440,'York'),
    new square_sheet(9,106,1,460,503,420,463,'Market Weighton'),
    new square_sheet(9,107,1,460,540,420,500,'Kingston upon Hull'),
    new square_sheet(9,108,1,420,360,380,320,'Liverpool'),
    new square_sheet(9,109,1,420,400,380,360,'Manchester Bolton & Warrington'),
    new square_sheet(9,110,1,420,440,380,400,'Sheffield & Huddersfield'),
    new square_sheet(9,111,1,420,470,380,430,'Sheffield & Doncaster'),
    new square_sheet(9,112,1,425,510,385,470,'Scunthorpe'),
    new square_sheet(9,113,1,426,550,386,510,'Grimsby & Cleethorpes'),
    new square_sheet(9,114,1,400,260,360,220,'Anglesey'),
    new square_sheet(9,115,1,385,280,345,240,'Snowdon'),
    new square_sheet(9,116,1,385,320,345,280,'Denbigh & Colwyn Bay'),
    new square_sheet(9,117,1,380,360,340,320,'Chester'),
    new square_sheet(9,118,1,380,400,340,360,'The Potteries'),
    new square_sheet(9,119,1,380,440,340,400,'Buxton & Matlock'),
    new square_sheet(9,120,1,390,480,350,440,'Mansfield & Worksop'),
    new square_sheet(9,121,1,390,518,350,478,'Lincoln'),
    new square_sheet(9,122,1,390,558,350,518,'Skegness'),
    new square_sheet(9,123,1,360,250,320,210,'Lleyn Peninsula'),
    new square_sheet(9,124,1,345,290,305,250,'Dolgellau'),
    new square_sheet(9,125,1,345,320,305,280,'Bala & Lake Vyrnwy'),
    new square_sheet(9,126,1,340,360,300,320,'Shrewsbury'),
    new square_sheet(9,127,1,340,400,300,360,'Stafford & Telford'),
    new square_sheet(9,128,1,348,440,308,400,'Derby & Burton upon Trent'),
    new square_sheet(9,129,1,350,480,310,440,'Nottingham & Loughborough'),
    new square_sheet(9,130,1,350,520,310,480,'Grantham'),
    new square_sheet(9,131,1,350,560,310,520,'Boston & Spalding'),
    new square_sheet(9,132,1,350,600,310,560,'North West Norfolk'),
    new square_sheet(9,133,1,350,640,310,600,'North East Norfolk'),
    new square_sheet(9,134,1,330,657,290,617,'Norwich & The Broads'),
    new square_sheet(9,135,1,305,290,265,250,'Aberystwyth'),
    new square_sheet(9,136,1,305,320,265,280,'Newtown & Llanidloes'),
    new square_sheet(9,137,1,300,360,260,320,'Ludlow & Wenlock Edge'),
    new square_sheet(9,138,1,300,385,260,345,'Kidderminster & Wyre Forest'),
    new square_sheet(9,139,1,308,425,268,385,'Birmingham'),
    new square_sheet(9,140,1,310,465,270,425,'Leicester Coventry & Rugby'),
    new square_sheet(9,141,1,310,505,270,465,'Kettering & Corby'),
    new square_sheet(9,142,1,314,545,274,505,'Peterborough'),
    new square_sheet(9,143,1,314,577,274,537,'Ely & Wisbech'),
    new square_sheet(9,144,1,310,617,270,577,'Thetford & Breckland'),
    new square_sheet(9,145,1,260,240,220,200,'Cardigan'),
    new square_sheet(9,146,1,265,280,225,240,'Lampeter & Llandovery'),
    new square_sheet(9,147,1,280,310,240,270,'Elan Valley & Builth Wells'),
    new square_sheet(9,148,1,280,350,240,310,'Presteigne & Hay-on-Wye'),
    new square_sheet(9,149,1,268,373,228,333,'Hereford & Leominster'),
    new square_sheet(9,150,1,268,413,228,373,'Worcester & The Malverns'),
    new square_sheet(9,151,1,270,453,230,413,'Stratford-upon-Avon'),
    new square_sheet(9,152,1,270,493,230,453,'Northampton & Milton Keynes'),
    new square_sheet(9,153,1,274,533,234,493,'Bedford & Huntingdon'),
    new square_sheet(9,154,1,274,573,234,533,'Cambridge & Newmarket'),
    new square_sheet(9,155,1,274,613,234,573,'Bury St Edmunds'),
    new square_sheet(9,156,1,290,653,250,613,'Saxmundham'),
    new square_sheet(9,157,1,241,205,201,165,'St Davids & Haverfordwest'),
    new square_sheet(9,158,1,230,229,190,189,'Tenby'),
    new square_sheet(9,159,1,225,269,185,229,'Swansea & Gower'),
    new square_sheet(9,160,1,245,309,205,269,'Brecon Beacons'),
    new square_sheet(9,161,1,245,349,205,309,'Abergavenny & The Black Mountains'),
    new square_sheet(9,162,1,228,389,188,349,'Gloucester & Forest of Dean'),
    new square_sheet(9,163,1,230,429,190,389,'Cheltenham & Cirencester'),
    new square_sheet(9,164,1,230,469,190,429,'Oxford'),
    new square_sheet(9,165,1,235,500,195,460,'Aylesbury & Leighton Buzzard'),
    new square_sheet(9,166,1,234,540,194,500,'Luton & Hertford'),
    new square_sheet(9,167,1,234,580,194,540,'Chelmsford'),
    new square_sheet(9,168,1,234,620,194,580,'Colchester'),
    new square_sheet(9,169,1,250,647,210,607,'Ipswich & The Naze'),
    new square_sheet(9,170,1,205,309,165,269,'Vale of Glamorgan & Rhondda'),
    new square_sheet(9,171,1,205,349,165,309,'Cardiff & Newport'),
    new square_sheet(9,172,1,195,380,155,340,'Bristol & Bath'),
    new square_sheet(9,173,1,195,420,155,380,'Swindon & Devizes'),
    new square_sheet(9,174,1,195,460,155,420,'Newbury & Wantage'),
    new square_sheet(9,175,1,195,500,155,460,'Reading & Windsor'),
    new square_sheet(9,176,1,200,535,160,495,'West London'),
    new square_sheet(9,177,1,200,570,160,530,'East London'),
    new square_sheet(9,178,1,195,605,155,565,'Thames Estuary'),
    new square_sheet(9,179,1,173,643,133,603,'Canterbury & East Kent'),
    new square_sheet(9,180,1,152,280,112,240,'Barnstaple and Ilfracombe'),
    new square_sheet(9,181,1,152,320,112,280,'Minehead & Brendon Hills'),
    new square_sheet(9,182,1,170,360,130,320,'Weston-super-Mare & Bridgwater'),
    new square_sheet(9,183,1,155,389,115,349,'Yeovil & Frome'),
    new square_sheet(9,184,1,155,429,115,389,'Salisbury and The Plain'),
    new square_sheet(9,185,1,156,469,116,429,'Winchester & Basingstoke'),
    new square_sheet(9,186,1,165,505,125,465,'Aldershot & Guildford'),
    new square_sheet(9,187,1,165,545,125,505,'Dorking & Reigate'),
    new square_sheet(9,188,1,165,585,125,545,'Maidstone & The Weald of Kent'),
    new square_sheet(9,189,1,155,625,115,585,'Ashford & Romsey Marsh'),
    new square_sheet(9,190,1,127,247,87,207,'Bude & Clovelly'),
    new square_sheet(9,191,1,112,287,72,247,'Okehampton & North Dartmoor'),
    new square_sheet(9,192,1,112,327,72,287,'Exeter & Sidmouth'),
    new square_sheet(9,193,1,130,350,90,310,'Taunton & Lyme Regis'),
    new square_sheet(9,194,1,115,429,75,389,'Bournemouth & Purbeck'),
    new square_sheet(9,195,1,115,389,75,349,'Dorchester & Weymouth'),
    new square_sheet(9,196,1,116,469,76,429,'The Solent & Isle of Wight'),
    new square_sheet(9,197,1,130,509,90,469,'Chichester & The Downs'),
    new square_sheet(9,198,1,130,549,90,509,'Brighton & The Downs'),
    new square_sheet(9,199,1,130,589,90,549,'Eastbourne & Hastings'),
    new square_sheet(9,200,1,90,215,50,175,'Newquay & Bodmin'),
    new square_sheet(9,201,1,87,255,47,215,'Plymouth & Launceston'),
    new square_sheet(9,202,1,72,295,32,255,'Torbay & South Dartmoor'),
    new square_sheet(9,203,1,51,172,11,132,'Land\'s End & Isles of Scilly'),
    new square_sheet(9,204,1,54,212,14,172,'Truro & Falmouth'),
//    Inserts
    new square_sheet(9,3,1,1167,416,1161,409,'Sheltand - North Mainland'),
    new square_sheet(9,4,1,1143,400,1135,392,'Shetland - South Mainland'),
    new square_sheet(9,4,1,1076,425,1068,417,'Shetland - South Mainland'),
    new square_sheet(9,5,1,1018,369,1015,366,'Orkney - Northern Isles'),
    new square_sheet(9,6,1,1025,264,1023,261,'Orkney - Mainland'),
    new square_sheet(9,6,1,1019,258,1017,255,'Orkney - Mainland'),
    new square_sheet(9,8,1,1035,184,1030,179,'Stornoway & North Lewis'),
    new square_sheet(9,8,1,1033,164,1028,159,'Stornoway & North Lewis'),
    new square_sheet(9,8,1,967,153,966,151,'Stornoway & North Lewis'),
    new square_sheet(9,13,1,947,74,945,68,'West Lewis & North Harris'),
    new square_sheet(9,13,1,912,89,910,87,'West Lewis & North Harris'),
    new square_sheet(9,15,1,906,194,901,190,'Loch Assynt'),
    new square_sheet(9,18,1,907,17,896,5,'South of Harris & St Kilda'),
    new square_sheet(9,18,1,883,63,880,59,'South of Harris & St Kilda'),
    new square_sheet(9,18,1,872,70,866,64,'South of Harris & St Kilda'),
    new square_sheet(9,19,1,892,174,866,172,'Gairloch & Ullapool'),
    new square_sheet(9,22,1,866,59,863,56,'Benbecula & South Uist'),
    new square_sheet(9,23,1,882,145,876,135,'North Skye'),
    new square_sheet(9,23,1,877,145,876,139,'North Skye'),
    new square_sheet(9,31,1,786,59,778,53,'Barra & South Uist'),
    new square_sheet(9,32,1,800,158,799,156,'South Skye'),
    new square_sheet(9,39,1,798,118,795,114,'Rhum & Eigg'),
    new square_sheet(9,46,1,736,133,735,132,'Coll & Tiree'),
    new square_sheet(9,49,1,720,163,719,162,'Oban & East Mull'),
    new square_sheet(9,55,1,711,164,709,163,'Lochgilphead & Loch Awe'),
    new square_sheet(9,59,1,731,341,730,339,'St Andrews Kirkcaldy & Glenrothes'),
    new square_sheet(9,59,1,701,367,698,363,'St Andrews Kirkcaldy & Glenrothes'),
    new square_sheet(9,69,1,653,216,650,215,'Isle of Arran'),
    new square_sheet(9,94,1,526,462,525,460,'Whitby'),
    new square_sheet(9,108,1,392,321,385,317,'Liverpool'),
    new square_sheet(9,114,1,383,266,376,260,'Anglesey'),
    new square_sheet(9,116,1,386,313,385,310,'Denbigh & Colwyn Bay'),
    new square_sheet(9,145,1,261,239,260,238,'Cardigan'),
    new square_sheet(9,156,1,290,654,282,653,'Saxmundham'),
    new square_sheet(9,156,1,291,643,290,642,'Saxmundham'),
    new square_sheet(9,157,1,242,202,241,200,'St Davids & Haverfordwest'),
    new square_sheet(9,157,1,242,190,241,188,'St Davids & Haverfordwest'),
    new square_sheet(9,157,1,210,161,208,158,'St Davids & Haverfordwest'),
    new square_sheet(9,157,1,210,148,208,145,'St Davids & Haverfordwest'),
    new square_sheet(9,158,1,203,189,195,188,'Tenby'),
    new square_sheet(9,159,1,185,248,184,246,'Swansea & Gower'),
    new square_sheet(9,162,1,188,352,187,349,'Gloucester & Forest of Dean'),
    new square_sheet(9,172,1,172,340,170,339,'Bristol & Bath'),
    new square_sheet(9,178,1,196,605,195,603,'Thames Estuary'),
    new square_sheet(9,178,1,196,595,195,593,'Thames Estuary'),
    new square_sheet(9,180,1,149,215,143,212,'Barnstaple and Ilfracombe'),
    new square_sheet(9,190,1,128,228,127,222,'Bude & Clovelly'),
    new square_sheet(9,193,1,90,330,89,323,'Taunton & Lyme Regis'),
    new square_sheet(9,195,1,378,371,68,365,'Dorchester & Weymouth'),
    new square_sheet(9,196,1,76,453,75,449,'The Solent & Isle of Wight'),
    new square_sheet(9,200,1,50,211,214,209,'Newquay & Bodmin'),
    new square_sheet(9,201,1,34,240,32,238,'Plymouth & Launceston'),
    new square_sheet(9,201,1,53,215,50,213,'Plymouth & Launceston'),
    new square_sheet(9,202,1,73,94,72,88,'Torbay & South Dartmoor'),
    new square_sheet(9,203,1,55,176,50,169,'Land\'s End & Isles of Scilly'),
    new square_sheet(9,203,1,18,96,5,80,'Land\'s End & Isles of Scilly'),
    new square_sheet(9,203,1,13,128,11,126,'Land\'s End & Isles of Scilly'),
    new square_sheet(9,204,1,53,214,50,212,'Truro & Falmouth'),

    
// Ireland One-Inch 
    new square_sheet(10,1,4,732680,163040,669320,68000,''),
    new square_sheet(10,2,4,732680,258080,669320,163040,''),
    new square_sheet(10,3,4,669320,-27040,605960,-122080,''),
    new square_sheet(10,4,4,669320,68000,605960,-27040,''),
    new square_sheet(10,5,4,669320,163040,605960,68000,''),
    new square_sheet(10,6,4,669320,258080,605960,163040,''),
    new square_sheet(10,7,4,669320,353120,605960,258080,''),
    new square_sheet(10,8,4,669320,448160,605960,353120,''),
    new square_sheet(10,9,4,605960,-27040,542600,-122080,''),
    new square_sheet(10,10,4,605960,68000,542600,-27040,''),
    new square_sheet(10,11,4,605960,163040,542600,68000,''),
    new square_sheet(10,12,4,605960,258080,542600,163040,''),
    new square_sheet(10,13,4,605960,353120,542600,258080,''),
    new square_sheet(10,14,4,605960,448160,542600,353120,''),
    new square_sheet(10,15,4,542600,-27040,479240,-122080,''),
    new square_sheet(10,16,4,542600,68000,479240,-27040,''),
    new square_sheet(10,17,4,542600,163040,479240,68000,''),
    new square_sheet(10,18,4,542600,258080,479240,163040,''),
    new square_sheet(10,19,4,542600,353120,479240,258080,''),
    new square_sheet(10,20,4,542600,448160,479240,353120,''),
    new square_sheet(10,21,4,542600,543200,479240,448160,''),
    new square_sheet(10,22,4,479240,-122080,415880,-217120,''),
    new square_sheet(10,23,4,479240,-27040,415880,-122080,''),
    new square_sheet(10,24,4,479240,68000,415880,-27040,''),
    new square_sheet(10,25,4,479240,163040,415880,68000,''),
    new square_sheet(10,26,4,479240,258080,415880,163040,''),
    new square_sheet(10,27,4,479240,353120,415880,258080,''),
    new square_sheet(10,28,4,479240,448160,415880,353120,''),
    new square_sheet(10,29,4,479240,543200,415880,448160,''),
    new square_sheet(10,30,4,415880,-122080,352520,-217120,''),
    new square_sheet(10,31,4,415880,-27040,352520,-122080,''),
    new square_sheet(10,32,4,415880,68000,352520,-27040,''),
    new square_sheet(10,33,4,415880,163040,352520,68000,''),
    new square_sheet(10,34,4,415880,258080,352520,163040,''),
    new square_sheet(10,35,4,415880,353120,352520,258080,''),
    new square_sheet(10,36,4,415880,448160,352520,353120,''),
    new square_sheet(10,37,4,415880,543200,352520,448160,''),
    new square_sheet(10,38,4,415880,638240,352520,543200,''),
    new square_sheet(10,39,4,352520,-407200,289160,-502240,''),
    new square_sheet(10,40,4,352520,-312160,289160,-407200,''),
    new square_sheet(10,41,4,352520,-217120,289160,-312160,''),
    new square_sheet(10,42,4,352520,-122080,289160,-217120,''),
    new square_sheet(10,43,4,352520,-27040,289160,-122080,''),
    new square_sheet(10,44,4,352520,68000,289160,-27040,''),
    new square_sheet(10,45,4,352520,163040,289160,68000,''),
    new square_sheet(10,46,4,352520,258080,289160,163040,''),
    new square_sheet(10,47,4,352520,353120,289160,258080,''),
    new square_sheet(10,48,4,352520,448160,289160,353120,''),
    new square_sheet(10,49,4,352520,543200,289160,448160,''),
    new square_sheet(10,50,4,352520,638240,289160,543200,''),
    new square_sheet(10,51,4,289160,-407200,225800,-502240,''),
    new square_sheet(10,52,4,289160,-312160,225800,-407200,''),
    new square_sheet(10,53,4,289160,-217120,225800,-312160,''),
    new square_sheet(10,54,4,289160,-122080,225800,-217120,''),
    new square_sheet(10,55,4,289160,-27040,225800,-122080,''),
    new square_sheet(10,56,4,289160,68000,225800,-27040,''),
    new square_sheet(10,57,4,289160,163040,225800,68000,''),
    new square_sheet(10,58,4,289160,258080,225800,163040,''),
    new square_sheet(10,59,4,289160,353120,225800,258080,''),
    new square_sheet(10,60,4,289160,448160,225800,353120,''),
    new square_sheet(10,61,4,289160,543200,225800,448160,''),
    new square_sheet(10,62,4,225800,-407200,162440,-502240,''),
    new square_sheet(10,63,4,225800,-312160,162440,-407200,''),
    new square_sheet(10,64,4,225800,-217120,162440,-312160,''),
    new square_sheet(10,65,4,225800,-122080,162440,-217120,''),
    new square_sheet(10,66,4,225800,-27040,162440,-122080,''),
    new square_sheet(10,67,4,225800,68000,162440,-27040,''),
    new square_sheet(10,68,4,225800,163040,162440,68000,''),
    new square_sheet(10,69,4,225800,258080,162440,163040,''),
    new square_sheet(10,70,4,225800,353120,162440,258080,''),
    new square_sheet(10,71,4,225800,448160,162440,353120,''),
    new square_sheet(10,72,4,225800,543200,162440,448160,''),
    new square_sheet(10,73,4,162440,-407200,99080,-502240,''),
    new square_sheet(10,74,4,162440,-312160,99080,-407200,''),
    new square_sheet(10,75,4,162440,-217120,99080,-312160,''),
    new square_sheet(10,76,4,162440,-122080,99080,-217120,''),
    new square_sheet(10,77,4,162440,-27040,99080,-122080,''),
    new square_sheet(10,78,4,162440,68000,99080,-27040,''),
    new square_sheet(10,79,4,162440,163040,99080,68000,''),
    new square_sheet(10,80,4,162440,258080,99080,163040,''),
    new square_sheet(10,81,4,162440,353120,99080,258080,''),
    new square_sheet(10,82,4,162440,448160,99080,353120,''),
    new square_sheet(10,83,4,99080,-407200,35720,-502240,''),
    new square_sheet(10,84,4,99080,-312160,35720,-407200,''),
    new square_sheet(10,85,4,99080,-217120,35720,-312160,''),
    new square_sheet(10,86,4,99080,-122080,35720,-217120,''),
    new square_sheet(10,87,4,99080,-27040,35720,-122080,''),
    new square_sheet(10,88,4,99080,68000,35720,-27040,''),
    new square_sheet(10,89,4,99080,163040,35720,68000,''),
    new square_sheet(10,90,4,99080,258080,35720,163040,''),
    new square_sheet(10,91,4,99080,353120,35720,258080,''),
    new square_sheet(10,92,4,99080,448160,35720,353120,''),
    new square_sheet(10,93,4,35720,-407200,-27640,-502240,''),
    new square_sheet(10,94,4,35720,-312160,-27640,-407200,''),
    new square_sheet(10,95,4,35720,-217120,-27640,-312160,''),
    new square_sheet(10,96,4,35720,-122080,-27640,-217120,''),
    new square_sheet(10,97,4,35720,-27040,-27640,-122080,''),
    new square_sheet(10,98,4,35720,68000,-27640,-27040,''),
    new square_sheet(10,99,4,35720,163040,-27640,68000,''),
    new square_sheet(10,100,4,35720,258080,-27640,163040,''),
    new square_sheet(10,101,4,35720,353120,-27640,258080,''),
    new square_sheet(10,102,4,35720,448160,-27640,353120,''),
    new square_sheet(10,103,4,-27640,-407200,-91000,-502240,''),
    new square_sheet(10,104,4,-27640,-312160,-91000,-407200,''),
    new square_sheet(10,105,4,-27640,-217120,-91000,-312160,''),
    new square_sheet(10,106,4,-27640,-122080,-91000,-217120,''),
    new square_sheet(10,107,4,-27640,-27040,-91000,-122080,''),
    new square_sheet(10,108,4,-27640,68000,-91000,-27040,''),
    new square_sheet(10,109,4,-27640,163040,-91000,68000,''),
    new square_sheet(10,110,4,-27640,258080,-91000,163040,''),
    new square_sheet(10,111,4,-27640,353120,-91000,258080,''),
    new square_sheet(10,112,4,-27640,448160,-91000,353120,''),
    new square_sheet(10,113,4,-91000,-312160,-154360,-407200,''),
    new square_sheet(10,114,4,-91000,-217120,-154360,-312160,''),
    new square_sheet(10,115,4,-91000,-122080,-154360,-217120,''),
    new square_sheet(10,116,4,-91000,-27040,-154360,-122080,''),
    new square_sheet(10,117,4,-91000,68000,-154360,-27040,''),
    new square_sheet(10,118,4,-91000,163040,-154360,68000,''),
    new square_sheet(10,119,4,-91000,258080,-154360,163040,''),
    new square_sheet(10,120,4,-91000,353120,-154360,258080,''),
    new square_sheet(10,121,4,-91000,448160,-154360,353120,''),
    new square_sheet(10,122,4,-154360,-312160,-217720,-407200,''),
    new square_sheet(10,123,4,-154360,-217120,-217720,-312160,''),
    new square_sheet(10,124,4,-154360,-122080,-217720,-217120,''),
    new square_sheet(10,125,4,-154360,-27040,-217720,-122080,''),
    new square_sheet(10,126,4,-154360,68000,-217720,-27040,''),
    new square_sheet(10,127,4,-154360,163040,-217720,68000,''),
    new square_sheet(10,128,4,-154360,258080,-217720,163040,''),
    new square_sheet(10,129,4,-154360,353120,-217720,258080,''),
    new square_sheet(10,130,4,-154360,448160,-217720,353120,''),
    new square_sheet(10,131,4,-217720,-312160,-281080,-407200,''),
    new square_sheet(10,132,4,-217720,-217120,-281080,-312160,''),
    new square_sheet(10,133,4,-217720,-122080,-281080,-217120,''),
    new square_sheet(10,134,4,-217720,-27040,-281080,-122080,''),
    new square_sheet(10,135,4,-217720,68000,-281080,-27040,''),
    new square_sheet(10,136,4,-217720,163040,-281080,68000,''),
    new square_sheet(10,137,4,-217720,258080,-281080,163040,''),
    new square_sheet(10,138,4,-217720,353120,-281080,258080,''),
    new square_sheet(10,139,4,-217720,448160,-281080,353120,''),
    new square_sheet(10,140,4,-281080,-407200,-344440,-502240,''),
    new square_sheet(10,141,4,-281080,-312160,-344440,-407200,''),
    new square_sheet(10,142,4,-281080,-217120,-344440,-312160,''),
    new square_sheet(10,143,4,-281080,-122080,-344440,-217120,''),
    new square_sheet(10,144,4,-281080,-27040,-344440,-122080,''),
    new square_sheet(10,145,4,-281080,68000,-344440,-27040,''),
    new square_sheet(10,146,4,-281080,163040,-344440,68000,''),
    new square_sheet(10,147,4,-281080,258080,-344440,163040,''),
    new square_sheet(10,148,4,-281080,353120,-344440,258080,''),
    new square_sheet(10,149,4,-281080,448160,-344440,353120,''),
    new square_sheet(10,150,4,-344440,-407200,-407800,-502240,''),
    new square_sheet(10,151,4,-344440,-312160,-407800,-407200,''),
    new square_sheet(10,152,4,-344440,-217120,-407800,-312160,''),
    new square_sheet(10,153,4,-344440,-122080,-407800,-217120,''),
    new square_sheet(10,154,4,-344440,-27040,-407800,-122080,''),
    new square_sheet(10,155,4,-344440,68000,-407800,-27040,''),
    new square_sheet(10,156,4,-344440,163040,-407800,68000,''),
    new square_sheet(10,157,4,-344440,258080,-407800,163040,''),
    new square_sheet(10,158,4,-344440,353120,-407800,258080,''),
    new square_sheet(10,159,4,-344440,448160,-407800,353120,''),
    new square_sheet(10,160,4,-407800,-502240,-471160,-597280,''),
    new square_sheet(10,161,4,-407800,-407200,-471160,-502240,''),
    new square_sheet(10,162,4,-407800,-312160,-471160,-407200,''),
    new square_sheet(10,163,4,-407800,-217120,-471160,-312160,''),
    new square_sheet(10,164,4,-407800,-122080,-471160,-217120,''),
    new square_sheet(10,165,4,-407800,-27040,-471160,-122080,''),
    new square_sheet(10,166,4,-407800,68000,-471160,-27040,''),
    new square_sheet(10,167,4,-407800,163040,-471160,68000,''),
    new square_sheet(10,168,4,-407800,258080,-471160,163040,''),
    new square_sheet(10,169,4,-407800,353120,-471160,258080,''),
    new square_sheet(10,170,4,-407800,448160,-471160,353120,''),
    new square_sheet(10,171,4,-471160,-502240,-534520,-597280,''),
    new square_sheet(10,172,4,-471160,-407200,-534520,-502240,''),
    new square_sheet(10,173,4,-471160,-312160,-534520,-407200,''),
    new square_sheet(10,174,4,-471160,-217120,-534520,-312160,''),
    new square_sheet(10,175,4,-471160,-122080,-534520,-217120,''),
    new square_sheet(10,176,4,-471160,-27040,-534520,-122080,''),
    new square_sheet(10,177,4,-471160,68000,-534520,-27040,''),
    new square_sheet(10,178,4,-471160,163040,-534520,68000,''),
    new square_sheet(10,179,4,-471160,258080,-534520,163040,''),
    new square_sheet(10,180,4,-471160,353120,-534520,258080,''),
    new square_sheet(10,181,4,-471160,448160,-534520,353120,''),
    new square_sheet(10,182,4,-534520,-502240,-597880,-597280,''),
    new square_sheet(10,183,4,-534520,-407200,-597880,-502240,''),
    new square_sheet(10,184,4,-534520,-312160,-597880,-407200,''),
    new square_sheet(10,185,4,-534520,-217120,-597880,-312160,''),
    new square_sheet(10,186,4,-534520,-122080,-597880,-217120,''),
    new square_sheet(10,187,4,-534520,-27040,-597880,-122080,''),
    new square_sheet(10,188,4,-534520,68000,-597880,-27040,''),
    new square_sheet(10,189,4,-534520,163040,-597880,68000,''),
    new square_sheet(10,190,4,-597880,-502240,-661240,-597280,''),
    new square_sheet(10,191,4,-597880,-407200,-661240,-502240,''),
    new square_sheet(10,192,4,-597880,-312160,-661240,-407200,''),
    new square_sheet(10,193,4,-597880,-217120,-661240,-312160,''),
    new square_sheet(10,194,4,-597880,-122080,-661240,-217120,''),
    new square_sheet(10,195,4,-597880,-27040,-661240,-122080,''),
    new square_sheet(10,196,4,-597880,68000,-661240,-27040,''),
    new square_sheet(10,197,4,-661240,-502240,-724600,-597280,''),
    new square_sheet(10,198,4,-661240,-407200,-724600,-502240,''),
    new square_sheet(10,199,4,-661240,-312160,-724600,-407200,''),
    new square_sheet(10,200,4,-661240,-217120,-724600,-312160,''),
    new square_sheet(10,201,4,-661240,-122080,-724600,-217120,''),
    new square_sheet(10,202,4,-661240,-27040,-724600,-122080,''),
    new square_sheet(10,203,4,-724600,-407200,-787960,-502240,''),
    new square_sheet(10,204,4,-724600,-312160,-787960,-407200,''),
    new square_sheet(10,205,4,-724600,-217120,-787960,-312160,''),

// OSI 1:50,000
    new square_sheet(11,1,5,448,196,406,164,'Donegal (NW)'),
    new square_sheet(11,2,5,454,236,424,196,'Donegal (N Cent)'),
    new square_sheet(11,3,5,460,268,430,228,'Donegal (NE), Derry'),
    new square_sheet(11,6,5,424,236,394,196,'Donegal (Cent), Tyrone'),
    new square_sheet(11,10,5,406,180,364,150,'Donegal (SW)'),
    new square_sheet(11,11,5,406,212,364,180,'Donegal (S)'),
    new square_sheet(11,16,5,364,196,334,156,'Donegal, Fermanagh, Leitrim, Sligo'),
    new square_sheet(11,22,5,346,84,304,52,'Mayo'),
    new square_sheet(11,23,5,346,116,306,84,'Mayo'),
    new square_sheet(11,24,5,346,148,304,116,'Mayo, Sligo'),
    new square_sheet(11,25,5,340,188,310,148,'Sligo (E), Leitrim, Roscommon'),
    new square_sheet(11,29,5,337,341,332,340,'The Mournes'),
    new square_sheet(11,30,5,310,92,280,52,'Mayo (W.Central)'),
    new square_sheet(11,31,5,310,132,280,92,'Mayo (Central)'),
    new square_sheet(11,32,5,310,172,280,132,'Mayo, Roscommon, Sligo'),
    new square_sheet(11,33,5,310,212,280,172,'Leitrim, Longford, Roscommon, Sligo'),
    new square_sheet(11,34,5,310,252,280,212,'Cavan, Leitrim, Longford, Meath, Westmeath'),
    new square_sheet(11,35,5,310,292,280,252,'Cavan, Louth, Meath, Monaghan'),
    new square_sheet(11,36,5,310,332,280,292,'Armagh, Down, Louth, Meath, Monaghan'),
    new square_sheet(11,37,5,280,92,250,52,'Mayo (SW), Galway'),
    new square_sheet(11,38,5,280,132,250,92,'Galway, Mayo (S Cent)'),
    new square_sheet(11,39,5,280,172,250,132,'Galway, Mayo, Roscommon'),
    new square_sheet(11,40,5,280,212,250,172,'Galway, Longford, Roscommon, Westmeath'),
    new square_sheet(11,41,5,280,252,250,212,'Longford, Meath, Westmeath'),
    new square_sheet(11,42,5,280,292,250,252,'Meath, Westmeath'),
    new square_sheet(11,43,5,280,332,250,292,'Dublin, Louth, Meath'),
    new square_sheet(11,44,5,250,92,220,52,'Galway'),
    new square_sheet(11,45,5,250,132,220,92,'Galway'),
    new square_sheet(11,46,5,250,172,220,132,'Galway'),
    new square_sheet(11,47,5,250,212,220,172,'Galway, Offaly, Roscommon, Westmeath'),
    new square_sheet(11,48,5,250,252,220,212,'Offaly, Westmeath'),
    new square_sheet(11,49,5,250,292,220,252,'Kildare, Meath, Offaly, Westmeath'),
    new square_sheet(11,50,5,250,332,220,292,'Dublin, Kildare, Meath, Wicklow'),
    new square_sheet(11,51,5,220,132,190,92,'Clare, Galway'),
    new square_sheet(11,52,5,220,172,190,132,'Clare, Galway'),
    new square_sheet(11,53,5,220,212,190,172,'Clare, Galway, Offaly, Tipperary'),
    new square_sheet(11,54,5,220,252,190,212,'Laois, Offaly, Tipperary'),
    new square_sheet(11,55,5,220,292,190,252,'Kildare, Laois, Offaly, Wicklow'),
    new square_sheet(11,56,5,220,332,190,292,'Wicklow, Dublin, Kildare'),
    new square_sheet(11,57,5,190,132,160,92,'Clare'),
    new square_sheet(11,58,5,190,172,160,132,'Clare, Limerick, Tipperaray'),
    new square_sheet(11,59,5,190,212,160,172,'Clare, Offaly, Tipperaray'),
    new square_sheet(11,60,5,190,252,160,212,'Kilkenny, Laois, Tipperary'),
    new square_sheet(11,61,5,190,292,160,252,'Carlow, Kildare, Kilkenny, Laois, Wicklow'),
    new square_sheet(11,62,5,190,332,160,292,'Carlow, Wexford, Wicklow'),
    new square_sheet(11,63,5,172,100,142,60,'Clare, Kerry'),
    new square_sheet(11,64,5,160,140,130,100,'Clare, Kerry, Limerick'),
    new square_sheet(11,65,5,160,180,130,140,'Clare, Limerick, Tipperaray'),
    new square_sheet(11,66,5,160,220,130,180,'Tipperary, Limerick'),
    new square_sheet(11,67,5,160,260,130,220,'Kilkenny, Tipperary'),
    new square_sheet(11,68,5,160,300,130,260,'Carlow, Kilkenny, Wexford'),
    new square_sheet(11,69,5,160,322,130,282,'Wexford'),
    new square_sheet(11,70,5,120,60,90,20,'Kerry'),
    new square_sheet(11,71,5,130,100,100,60,'Kerry'),
    new square_sheet(11,72,5,130,140,100,100,'Kerry, Cork, Limerick'),
    new square_sheet(11,73,5,130,180,100,140,'Cork, Limerick'),
    new square_sheet(11,74,5,130,220,100,180,'Cork, Limerick, Tipperary, Waterford'),
    new square_sheet(11,75,5,130,260,100,220,'Kilkenny, Tipperary, Waterford (North)'),
    new square_sheet(11,76,5,136,284,96,254,'Carlow, Kilkenny, Waterford, Wexford'),
    new square_sheet(11,77,5,136,316,96,286,'Wexford'),
    new square_sheet(11,78,5,100,100,70,60,'Kerry'),
    new square_sheet(11,79,5,100,140,70,100,'Cork, Kerry'),
    new square_sheet(11,80,5,100,180,70,140,'Cork'),
    new square_sheet(11,81,5,100,212,60,182,'Cork, Waterford'),
    new square_sheet(11,82,5,106,252,76,212,'Waterford'),
    new square_sheet(11,83,5,90,70,60,30,'Kerry'),
    new square_sheet(11,84,5,70,408,40,368,'Cork, Kerry'),
    new square_sheet(11,85,5,70,124,40,84,'Cork, Kerry'),
    new square_sheet(11,86,5,70,164,40,124,'Cork'),
    new square_sheet(11,87,5,76,180,34,148,'Cork'),
    new square_sheet(11,88,5,46,108,16,68,'Cork'),
    new square_sheet(11,89,5,52,148,22,108,'Cork'),

// OSNI 1:50,000
    new square_sheet(14,4,5,450,300,420,260,'Coleraine'),
    new square_sheet(14,5,5,455,330,425,290,'Ballycastle'),
    new square_sheet(14,7,5,430,270,400,230,'Londonderry'),
    new square_sheet(14,8,5,430,310,400,270,'Ballymoney'),
    new square_sheet(14,9,5,425,350,395,310,'Larne'),
    new square_sheet(14,12,5,400,245,370,205,'Strabane'),
    new square_sheet(14,13,5,400,285,370,245,'The Sperrins'),
    new square_sheet(14,14,5,400,325,370,285,'Lough Neagh'),
    new square_sheet(14,15,5,395,365,365,325,'Belfast'),
    new square_sheet(14,17,5,370,228,340,188,'Lower Lough Erne'),
    new square_sheet(14,18,5,370,260,340,220,'Enniskillen'),
    new square_sheet(14,19,5,370,300,340,260,'Armagh'),
    new square_sheet(14,20,5,370,340,340,300,'Craigavon'),
    new square_sheet(14,21,5,374,370,334,340,'Strangford Lough'),
    new square_sheet(14,26,5,340,220,310,180,'Cavan, Fermanagh, Leitrim, Roscommon, Sligo'),
    new square_sheet(14,27,5,340,260,310,220,'Upper Lough Erne'),
    new square_sheet(14,28,5,340,300,310,260,'Monaghan'),
    new square_sheet(14,29,5,340,340,310,300,'The Mournes'),

];