VERTCRS["TAHAA_SAU 2001",
    VDATUM["TAHAA_SAU 2001"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["LOCALE A CARACTERE LEGAL"],
        AREA["TAHAA (ARCHIPEL DE LA SOCIETE)"],
        BBOX[-16.7,-151.58,-16.53,-151.38]],
    ID["IGNF","TAHAA01"]]