VERTCRS["IGN 1988 SM height",VDATUM["IGN 1988 SM"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1]],USAGE[SCOPE["Geodesy, engineering survey, topographic mapping."],AREA["Guadeloupe - onshore - St Martin island."],BBOX[18.01,-63.21,18.17,-62.96]],ID["EPSG",5620]]