VERT_CS["TGD2005",
    VERT_DATUM["D_Tonga_Geodetic_Datum_2005",2002,
        AUTHORITY["ESRI","from_geogdatum_EPSG_1095"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Ellipsoidal height",UP],
    AUTHORITY["ESRI","115799"]]