Geodesy, cadastre, engineering survey, topographic mapping.
Definition: OGC Well Known Text 2 (2019)
DATUM["NGO 1948 (Oslo)", ELLIPSOID["Bessel Modified",6377492.018,299.1528128, LENGTHUNIT["metre",1]], ID["EPSG",6817]], PRIMEM["Oslo",10.7229166666667, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8913]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "NGO 1948 (Oslo)", "ellipsoid": { "name": "Bessel Modified", "semi_major_axis": 6377492.018, "inverse_flattening": 299.1528128 }, "prime_meridian": { "name": "Oslo", "longitude": 10.7229166666667 }, "scope": "Geodesy, cadastre, engineering survey, topographic mapping.", "area": "Norway - onshore.", "bbox": { "south_latitude": 57.9, "west_longitude": 4.39, "north_latitude": 71.24, "east_longitude": 31.32 }, "id": { "authority": "EPSG", "code": 6817 } }