Topographic mapping.
The intent of the Bukavu 1953 conference was to adopt the Clarke 1880 (RGS) ellipsoid (code 7012) but in practice this datum has used the IGN version.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Garoua", "ellipsoid": { "name": "Clarke 1880 (IGN)", "semi_major_axis": 6378249.2, "semi_minor_axis": 6356515 }, "scope": "Topographic mapping.", "area": "Cameroon - onshore and offshore.", "bbox": { "south_latitude": 1.65, "west_longitude": 8.32, "north_latitude": 13.09, "east_longitude": 16.21 }, "id": { "authority": "EPSG", "code": 6234 } }