Levelling Homepage Ordnance Survey's
Levelling
of Great Britain		 [1GL, 2GL Abstract]
[1GL, 2GL Transcription]		 [Timeline]
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'Levelling' Files

[General Levelling Files - 1GL - 2GL] (All | Viewed)

[Summary of Records of the Ordnance Survey of Great Britain]

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RefSourceDateNotes
+ - OS 5Ordnance Survey: Maps and Plans1777-1971
OS 5/188Geodetic levelling: state of work 8 Aug 19141914
OS 5/189Geodetic levelling: stations1914
OS 5/191Geodetic levelling: state of work 31 Mar 19191919
OS 5/192Geodetic levelling: lines in London area1932Basic Map
OS 5/193Index map on initial levelling in Scotlandundated