{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeographicCRS","name":"Chua","datum":{"type":"GeodeticReferenceFrame","name":"Chua","ellipsoid":{"name":"International 1924","semi_major_axis":6378388,"inverse_flattening":297}},"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":"Brazil - south of 18°S and west of 54°W, plus Distrito Federal. Paraguay - north.","bbox":{"south_latitude":-31.91,"west_longitude":-62.57,"north_latitude":-15.37,"east_longitude":-47.1},"id":{"authority":"EPSG","code":4224},"remarks":"The Chua origin and associated network is in Brazil with a connecting traverse through northern Paraguay. In Brazil used only as input into the Corrego Allegre adjustment (CRS code 4225), except for government work including SICAD in Distrito Federal."}