Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Not specified (based on Hughes 1980 ellipsoid)", "ellipsoid": { "name": "Hughes 1980", "semi_major_axis": 6378273, "semi_minor_axis": 6356889.449 }, "scope": "Not a valid datum.", "area": "Not specified.", "bbox": { "south_latitude": -90, "west_longitude": -180, "north_latitude": 90, "east_longitude": 180 }, "id": { "authority": "EPSG", "code": 6054 } }