VERTCRS["TWD_1997",
    VDATUM["D_TWD_1997"],
    CS[vertical,1],
        AXIS["ellipsoidal height (h)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["Taiwan, Republic of China - onshore and offshore - Taiwan Island, Penghu (Pescadores) Islands."],
        BBOX[17.36,114.32,26.96,123.61]],
    ID["ESRI",115800]]