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

'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 14Ordnance Survey: Central Registry: Experiment Files (E Series)1950-1988
OS 14/54Minor experiments : trigonometry and levelling including reports1968 Feb 01-1969 Nov 24
OS 14/60Hydrostatic levelling1965 Dec 01-1972 Mar 31
OS 14/62Levelling equipment :field tests and reports of various automatic setting levels1968 Dec 01-1977 Mar 31
OS 14/68Fourth geodetic levelling : correspondence and reports1971 Jun 01-1977 Oct 31
OS 14/81Fourth Geodetic Levelling: proposed Ordnance Survey and Institute of Oceanographic Sciences experiment to compare geodetic and hydrodynamic levelling techniques1977 Oct 14-1980 May 21
OS 14/82Geodetic levelling techniques: includes National Geodetic Survey paper 'Refraction Errors in Levelling - NGS Test Results'; report on a visit to the National Survey of Sweden to view a motorised geodetic levelling production unit in operation1980 Jul 01-1981 Sep 16