Ordnance Survey's Levelling of Great Britain |
[1GL, 2GL Abstract] [1GL, 2GL Transcription] |
[Timeline] [FBM List] |
Files Held at Kew'Levelling' Files | [General Levelling Files - 1GL - 2GL] (All | Viewed) |
Ref | Source | Date | Notes |
---|---|---|---|
+ - OS 5 | Ordnance Survey: Maps and Plans | 1777-1971 | |
OS 5/192 | Geodetic levelling: lines in London area | 1932 | Basic Map |