{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeographicCRS","name":"Voirol 1875","datum":{"type":"GeodeticReferenceFrame","name":"Voirol 1875","ellipsoid":{"name":"Clarke 1880 (IGN)","semi_major_axis":6378249.2,"semi_minor_axis":6356515}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"scope":"Geodesy.","area":"Algeria - onshore north of 32°N.","bbox":{"south_latitude":31.99,"west_longitude":-2.95,"north_latitude":37.14,"east_longitude":9.09},"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)."}