Topographic mapping.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Dabola 1981", "ellipsoid": { "name": "Clarke 1880 (IGN)", "semi_major_axis": 6378249.2, "semi_minor_axis": 6356515 }, "scope": "Topographic mapping.", "area": "Guinea - onshore.", "bbox": { "south_latitude": 7.19, "west_longitude": -15.13, "north_latitude": 12.68, "east_longitude": -7.65 }, "id": { "authority": "EPSG", "code": 6155 } }