The name Ordnance Survey applies loosely to various organisations responsible for mapping parts of the British Isles. The sections under this heading deal with:
Channel Islands In the Channel Islands, the surveying and production of mapping is undertaken under licence by Digimap Ltd. See the report of the Society visit to Digimap in Guernsey in July 2009 here. View Guernsey mapping on-line.
There is also a section which details the catalogues produced by the Ordnance Survey in the Bibliographies of Catalogues.