Geodesy, topographic mapping.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Arc 1950", "ellipsoid": { "name": "Clarke 1880 (Arc)", "semi_major_axis": 6378249.145, "inverse_flattening": 293.4663077 }, "scope": "Geodesy, topographic mapping.", "area": "Botswana; Malawi; Zambia; Zimbabwe.", "bbox": { "south_latitude": -26.88, "west_longitude": 19.99, "north_latitude": -8.19, "east_longitude": 35.93 }, "id": { "authority": "EPSG", "code": 6209 } }