VERTCRS["IGN 1988 MG height",
    VDATUM["IGN 1988 MG"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Geodesy, engineering survey, topographic mapping."],
        AREA["Guadeloupe - onshore - Marie-Galante."],
        BBOX[15.8,-61.39,16.05,-61.13]],
    ID["EPSG",5617]]