Topographic mapping.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Agadez", "ellipsoid": { "name": "Clarke 1880 (IGN)", "semi_major_axis": 6378249.2, "semi_minor_axis": 6356515 }, "scope": "Topographic mapping.", "area": "Niger.", "bbox": { "south_latitude": 11.69, "west_longitude": 0.16, "north_latitude": 23.53, "east_longitude": 16 }, "id": { "authority": "EPSG", "code": 6206 } }