GEOGCRS["NTF geographiques Paris (gr)",
    DATUM["Nouvelle Triangulation Francaise (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 longitude (Lon)",east,
            ORDER[1],
            ANGLEUNIT["grad",0.0157079632679489]],
        AXIS["geodetic latitude (Lat)",north,
            ORDER[2],
            ANGLEUNIT["grad",0.0157079632679489]],
    USAGE[
        SCOPE["NATIONALE, HISTORIQUE"],
        AREA["FRANCE METROPOLITAINE (CORSE COMPRISE)"],
        BBOX[41,-5.5,52,10]],
    ID["IGNF","NTFPGRAD"]]