VERT_CS["PRS_1992",
    VERT_DATUM["D_Philippine_Reference_System_1992",2002,
        AUTHORITY["ESRI","from_geogdatum_EPSG_6683"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Ellipsoidal height",UP],
    AUTHORITY["ESRI","115771"]]