VERTCRS["NGF-IGN 1978",
    VDATUM["NGF-IGN 1978"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["LOCALE A CARACTERE LEGAL"],
        AREA["CORSE"],
        BBOX[41.2,8,43.5,10]],
    ID["IGNF","IGN78C"]]