EPSG
IGN, http://www.ign.fr/. Also https://geodesie.ign.fr/contenu/fichiers/RGF93v2b-RAF18b.pdf
2022-12-12
Geodesy.
RGF93 v2b is a realization of ETRS89. Third realization of RGF93. Replaces RGF93 v2 (datum code 1312) from 2021-01-05.
France - onshore and offshore, mainland and Corsica (France métropolitaine including Corsica).
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Reseau Geodesique Francais 1993 v2b", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 }, "scope": "Geodesy.", "area": "France - onshore and offshore, mainland and Corsica (France métropolitaine including Corsica).", "bbox": { "south_latitude": 41.15, "west_longitude": -9.86, "north_latitude": 51.56, "east_longitude": 10.38 }, "id": { "authority": "EPSG", "code": 1313 } }