VERTCRS["Bluff 1955 height",
    VDATUM["Bluff 1955"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Geodesy, engineering survey, topographic mapping."],
        AREA["New Zealand - South Island - Bluff vertical CRS area."],
        BBOX[-46.71,168.01,-46.26,168.86]],
    ID["EPSG",5760]]