VERTCRS["RSAO13",
    VDATUM["Reference_System_de_Angola_2013"],
    CS[vertical,1],
        AXIS["ellipsoidal height (h)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["Angola - onshore and offshore."],
        BBOX[-18.02,8.2,-4.38,24.09]],
    ID["ESRI",115902]]