Hydrography and nautical charting.
Replaced by Mauritania 1999 (datum code 6702).
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Jouik 1961", "ellipsoid": { "name": "Clarke 1880 (RGS)", "semi_major_axis": 6378249.145, "inverse_flattening": 293.465 }, "scope": "Hydrography and nautical charting.", "area": "Mauritania - coastal area north of Cape Timiris.", "bbox": { "south_latitude": 19.37, "west_longitude": -17.08, "north_latitude": 21.34, "east_longitude": -15.88 }, "id": { "authority": "EPSG", "code": 6679 } }