Use link below to download KML file for use in Google Earth. This has the definitions of the sheet boundaries for all Ordnance Survey One-Inch and 1:50,000 map Series of Great Britain and Ireland and 1:25,000 Provisional Series of UK.

To download the file 'OS_Series_by_CCS-SJedits.kml' go here. To use the file, open Google Earth, then open the KML file. When opened in Google Earth, use the check boxes on the left to select/de-select the various Series offered. On the map display, click within a sheet boundary to see the sheet name and number.

Please address any comments, queries or error reports to info@charlesclosesociety.org. This file has been created by Alastair Davies and updated by Steven Jules of SABRE Maps.