9531=COMPD_CS["RGAF09 + Guadeloupe 1988 height",GEOGCS["RGAF09",DATUM["Reseau_Geodesique_des_Antilles_Francaises_2009",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1073"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","5489"]],VERT_CS["Guadeloupe 1988 height",VERT_DATUM["Guadeloupe 1988",2005,AUTHORITY["EPSG","5155"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5757"]],AUTHORITY["EPSG","9531"]]