GEOGCRS["Voirol 1875 (Paris)",
    DATUM["Voirol 1875 (Paris)",
        ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
            LENGTHUNIT["metre",1]]],
    PRIMEM["Paris",2.5969213,
        ANGLEUNIT["grad",0.0157079632679489]],
    CS[ellipsoidal,2],
        AXIS["geodetic latitude (Lat)",north,
            ORDER[1],
            ANGLEUNIT["grad",0.0157079632679489]],
        AXIS["geodetic longitude (Lon)",east,
            ORDER[2],
            ANGLEUNIT["grad",0.0157079632679489]],
    USAGE[
        SCOPE["Geodesy."],
        AREA["Algeria - onshore north of 32°N."],
        BBOX[31.99,-2.95,37.14,9.09]],
    ID["EPSG",4811],
    REMARK["The appropriate usage of CRSs using the Voirol 1875 and 1879 datums is lost in antiquity. They differ by about 9 metres. Oil industry references to one could in reality be to either. All replaced by Nord Sahara 1959 (CRS code 4307)."]]