{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"BoundCRS","source_crs":{"type":"GeographicCRS","name":"Voirol 1875 (Paris)","datum":{"type":"GeodeticReferenceFrame","name":"Voirol 1875 (Paris)","ellipsoid":{"name":"Clarke 1880 (IGN)","semi_major_axis":6378249.2,"inverse_flattening":293.466021293627},"prime_meridian":{"name":"Paris","longitude":{"value":2.5969213,"unit":{"type":"AngularUnit","name":"grad","conversion_factor":0.0157079632679489}}}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":{"type":"AngularUnit","name":"grad","conversion_factor":0.0157079632679489}},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":{"type":"AngularUnit","name":"grad","conversion_factor":0.0157079632679489}}]},"id":{"authority":"EPSG","code":4811},"remarks":"The appropriate usage of CRSs using the Voirol 1875 and 1879 datums is lost in antiquity. They differ by about 9 metres. Oil industry references to one could in reality be to either. All replaced by Nord Sahara 1959 (CRS code 4307)."},"target_crs":{"type":"GeographicCRS","name":"Voirol 1875","datum":{"type":"GeodeticReferenceFrame","name":"Voirol 1875","ellipsoid":{"name":"Clarke 1880 (IGN)","semi_major_axis":6378249.2,"inverse_flattening":293.466021293627}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"id":{"authority":"EPSG","code":4304},"remarks":"The appropriate usage of CRSs using the Voirol 1875 and 1879 datums is lost in antiquity. They differ by about 9 metres. Oil industry references to one could in reality be to either. All replaced by Nord Sahara 1959 (CRS code 4307)."},"transformation":{"name":"Voirol 1875 (Paris) to Voirol 1875 (1)","source_crs":{"type":"GeographicCRS","name":"Voirol 1875 (Paris) (with Greenwich prime meridian)","datum":{"type":"GeodeticReferenceFrame","name":"Voirol 1875 (Paris) (with Greenwich prime meridian)","ellipsoid":{"name":"Clarke 1880 (IGN)","semi_major_axis":6378249.2,"inverse_flattening":293.466021293627}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":{"type":"AngularUnit","name":"grad","conversion_factor":0.0157079632679489}},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":{"type":"AngularUnit","name":"grad","conversion_factor":0.0157079632679489}}]}},"method":{"name":"Longitude rotation","id":{"authority":"EPSG","code":9601}},"parameters":[{"name":"Longitude offset","value":8414.02501199997,"unit":{"type":"Unit","name":"","conversion_factor":1},"id":{"authority":"EPSG","code":8602}}],"id":{"authority":"EPSG","code":1266}}}