Data source: EPSG
Information source: Statoil
Revision date: 2012-12-17
Scope: Geodesy, engineering survey, topographic mapping.
Remarks: Includes initial NN1954 system and NNN1957 system. Former name retained. Normal-orthometric heights. Replaced by NN2000.
Area of use: Norway - onshore.
Definition: OGC Well Known Text
VERT_DATUM["Norway Normal Null 1954",2005, AUTHORITY["EPSG","5174"]]
Definition: OGC Well Known Text 2 (2019)
VDATUM["Norway Normal Null 1954", ID["EPSG",5174]]
Definition: ESRI Well Known Text
VDATUM["Norway_Normal_Null_1954"]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "Norway Normal Null 1954", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "Norway - onshore.", "bbox": { "south_latitude": 57.93, "west_longitude": 4.68, "north_latitude": 71.21, "east_longitude": 31.22 }, "id": { "authority": "EPSG", "code": 5174 } }