VERTCRS["Mexico_ITRF2008",
    VDATUM["D_Mexico_ITRF2008"],
    CS[vertical,1],
        AXIS["ellipsoidal height (h)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["Mexico - onshore and offshore."],
        BBOX[12.1,-122.19,32.72,-84.64]],
    ID["ESRI",115751]]