VERTCRS["SA LLD height",
    VDATUM["South Africa Land Levelling Datum"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Geodesy, engineering survey, topographic mapping."],
        AREA["South Africa - mainland onshore."],
        BBOX[-34.88,16.45,-22.13,32.95]],
    ID["EPSG",9279]]