VERTCRS["IGN 1988 MG (GUADELOUPE / MARIE-GALANTE)",
    VDATUM["IGN 1988 MG (GUADELOUPE / MARIE-GALANTE)"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["LOCALE A CARACTERE LEGAL"],
        AREA["ILE DE MARIE-GALANTE (GUADELOUPE)"],
        BBOX[15.8,-61.4,16.13,-61.08]],
    ID["IGNF","GUAD88MG"]]