{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeographicCRS","name":"RGF93 v1","datum":{"type":"GeodeticReferenceFrame","name":"Reseau Geodesique Francais 1993 v1","ellipsoid":{"name":"GRS 1980","semi_major_axis":6378137,"inverse_flattening":298.257222101}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"scope":"Horizontal component of 3D system.","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":4171},"remarks":"See CRS code 7084 for alternate system with axes reversed used by IGN for GIS purposes. Replaced by RGF93 v2 (CRS code 9777) from 2010-06-18."}