VERT_CS["RSAO13",
    VERT_DATUM["Reference_System_de_Angola_2013",2002,
        AUTHORITY["ESRI","from_geogdatum_EPSG_1220"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Ellipsoidal height",UP],
    AUTHORITY["ESRI","115902"]]