Scope: Topographic mapping.
Area of use: France - onshore - mainland and Corsica.
Definition: OGC Well Known Text
DATUM["Nouvelle_Triangulation_Francaise_Paris", SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627, AUTHORITY["EPSG","7011"]], AUTHORITY["EPSG","6807"]], PRIMEM["Paris",2.33722917, AUTHORITY["EPSG","8903"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Nouvelle Triangulation Francaise (Paris)", ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627, LENGTHUNIT["metre",1]], ID["EPSG",6807]], PRIMEM["Paris",2.5969213, ANGLEUNIT["grad",0.0157079632679489], ID["EPSG",8903]]
Definition: ESRI Well Known Text
DATUM["D_NTF", SPHEROID["Clarke_1880_IGN",6378249.2,293.466021293627]], PRIMEM["Paris",2.33722917]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Nouvelle Triangulation Francaise (Paris)", "ellipsoid": { "name": "Clarke 1880 (IGN)", "semi_major_axis": 6378249.2, "semi_minor_axis": 6356515 }, "prime_meridian": { "name": "Paris", "longitude": { "value": 2.5969213, "unit": { "type": "AngularUnit", "name": "grad", "conversion_factor": 0.0157079632679489 } } }, "scope": "Topographic mapping.", "area": "France - onshore - mainland and Corsica.", "bbox": { "south_latitude": 41.31, "west_longitude": -4.87, "north_latitude": 51.14, "east_longitude": 9.63 }, "id": { "authority": "EPSG", "code": 6807 } }