{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeographicCRS","name":"Sierra Leone 1924","datum":{"type":"GeodeticReferenceFrame","name":"Sierra Leone Colony 1924","ellipsoid":{"name":"War Office","semi_major_axis":6378300,"inverse_flattening":296}},"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":"Sierra Leone - Freetown Peninsula.","bbox":{"south_latitude":8.32,"west_longitude":-13.34,"north_latitude":8.55,"east_longitude":-13.13},"id":{"authority":"EPSG","code":4174},"remarks":"Ellipsoid semi-major axis (a)=20926201 exactly Gold Coast feet; 1 Gold Coast foot = 0.3047997101815 m."}