VERTCRS["IGN 1988 SB (GUADELOUPE / SAINT-BARTHELEMY)",
    VDATUM["IGN 1988 SB (GUADELOUPE / SAINT-BARTHELEMY)"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["LOCALE A CARACTERE LEGAL"],
        AREA["ILE DE SAINT-BARTHELEMY"],
        BBOX[17.8,-63,18.03,-62.73]],
    ID["IGNF","GUAD88SB"]]