Nivellement General de la France - Lallemand
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Nivellement General de la France - Lallemand Open
Datum Details [VALID]
Name: Nivellement General de la France - Lallemand
Code: 5118
Type: vertical
Usage:
Usage Details
Scope: Geodesy, engineering survey, topographic mapping.
Extent:

Origin: Rivet number M.ac O-VIII on the Marseille tide gauge site, with the height fixed in 1897 at 1.661 metre above mean sea level between February 2nd 1885 and January 1st 1897.
Realisation Method:
Publication Date: 1897