Ellipsoid: Clarke 1880 (IGN)
Prime meridian: Greenwich
Data source: EPSG
Information source: IGN Paris
Revision date: 2008-06-24
Scope: Topographic mapping.
Remarks: Replaced by Voirol 1879 (code 6671).
Area of use: Algeria - onshore north of 32°N.
Definition: OGC Well Known Text
DATUM["Voirol_1875", SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627, AUTHORITY["EPSG","7011"]], AUTHORITY["EPSG","6304"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Voirol 1875", ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627, LENGTHUNIT["metre",1]], ID["EPSG",6304]]
Definition: ESRI Well Known Text
DATUM["D_Voirol_1875", SPHEROID["Clarke_1880_IGN",6378249.2,293.466021293627]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Voirol 1875", "ellipsoid": { "name": "Clarke 1880 (IGN)", "semi_major_axis": 6378249.2, "semi_minor_axis": 6356515 }, "scope": "Topographic mapping.", "area": "Algeria - onshore north of 32°N.", "bbox": { "south_latitude": 31.99, "west_longitude": -2.95, "north_latitude": 37.14, "east_longitude": 9.09 }, "id": { "authority": "EPSG", "code": 6304 } }