VERTCRS["Estonia_1997",
    VDATUM["D_Estonia_1997"],
    CS[vertical,1],
        AXIS["ellipsoidal height (h)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["Estonia - onshore and offshore."],
        BBOX[57.52,20.37,60,28.2]],
    ID["ESRI",115712]]