VERTCRS["MARGEN",
    VDATUM["D_Marco_Geodesico_Nacional"],
    CS[vertical,1],
        AXIS["ellipsoidal height (h)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["Bolivia."],
        BBOX[-22.91,-69.66,-9.67,-57.52]],
    ID["ESRI",115750]]