VERT_CS["IGN 1988 SM (GUADELOUPE / SAINT-MARTIN)",
    VERT_DATUM["IGN 1988 SM (GUADELOUPE / SAINT-MARTIN)",2005,
        AUTHORITY["IGNF","REA009"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["IGNF","GUAD88SM"]]