Lerwick
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Lerwick Open
Datum Details [VALID]
Name: Lerwick
Code: 5140
Type: vertical
Usage:
Usage Details
Scope: Geodesy, topographic mapping.
Extent:

Origin: Mean Sea Level at Lerwick 1979 correlated to pre-1900. Initially realised through levelling network adjustment, from 2002 redefined to be realised through OSGM geoid model.
Conventional Reference System:
Realisation Method:
Publication Date: 1979