Topographic mapping.
Fundamental point astronomic coordinates determined in 1878.
Definition: OGC Well Known Text 2 (2019)
DATUM["Carthage (Paris)", ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627, LENGTHUNIT["metre",1]], ID["EPSG",6816]], PRIMEM["Paris",2.5969213, ANGLEUNIT["grad",0.0157079632679489], ID["EPSG",8903]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Carthage (Paris)", "ellipsoid": { "name": "Clarke 1880 (IGN)", "semi_major_axis": 6378249.2, "semi_minor_axis": 6356515 }, "prime_meridian": { "name": "Paris", "longitude": { "value": 2.5969213, "unit": { "type": "AngularUnit", "name": "grad", "conversion_factor": 0.0157079632679489 } } }, "scope": "Topographic mapping.", "area": "Tunisia - onshore.", "bbox": { "south_latitude": 30.23, "west_longitude": 7.49, "north_latitude": 37.4, "east_longitude": 11.59 }, "id": { "authority": "EPSG", "code": 6816 } }