Data source: EPSG
Information source: Conseil National de l'Information Geographique groupe de travail "Reseaux de Nivellement" recommendations v5.1 April 1994.
Revision date: 1997-11-13
Scope: Geodesy, engineering survey, topographic mapping.
Remarks: Orthometric heights.
Area of use: France - mainland onshore.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "Nivellement General de la France - Lallemand", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "France - mainland onshore.", "bbox": { "south_latitude": 42.33, "west_longitude": -4.87, "north_latitude": 51.14, "east_longitude": 8.23 }, "id": { "authority": "EPSG", "code": 5118 } }