{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"ProjectedCRS","name":"Sierra Leone 1924 / New War Office Grid","base_crs":{"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"}]},"id":{"authority":"EPSG","code":4174},"remarks":"Ellipsoid semi-major axis (a)=20926201 exactly Gold Coast feet; 1 Gold Coast foot = 0.3047997101815 m."},"conversion":{"name":"New War Office Sierra Leone Grid","method":{"name":"Transverse Mercator","id":{"authority":"EPSG","code":9807}},"parameters":[{"name":"Latitude of natural origin","value":6.66666666666667,"unit":"degree","id":{"authority":"EPSG","code":8801}},{"name":"Longitude of natural origin","value":-12,"unit":"degree","id":{"authority":"EPSG","code":8802}},{"name":"Scale factor at natural origin","value":1,"unit":"unity","id":{"authority":"EPSG","code":8805}},{"name":"False easting","value":800000,"unit":{"type":"LinearUnit","name":"Gold Coast foot","conversion_factor":0.304799710181509},"id":{"authority":"EPSG","code":8806}},{"name":"False northing","value":600000,"unit":{"type":"LinearUnit","name":"Gold Coast foot","conversion_factor":0.304799710181509},"id":{"authority":"EPSG","code":8807}}]},"coordinate_system":{"subtype":"Cartesian","axis":[{"name":"Easting","abbreviation":"E","direction":"east","unit":{"type":"LinearUnit","name":"Gold Coast foot","conversion_factor":0.304799710181509}},{"name":"Northing","abbreviation":"N","direction":"north","unit":{"type":"LinearUnit","name":"Gold Coast foot","conversion_factor":0.304799710181509}}]},"scope":"Topographic mapping.","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":2160}}