COMPD_CS["ATIG geographiques grades Paris (gr) et NGF-BOURDALOUE",GEOGCS["ATIG geographiques grades Paris (gr)",DATUM["Ancienne_Triangulation_Francaise_Paris",SPHEROID["Plessis 1817",6376523,308.64,AUTHORITY["EPSG","7027"]],AUTHORITY["EPSG","6901"]],PRIMEM["Paris RGS",2.33720833333333,AUTHORITY["EPSG","8914"]],UNIT["grad",0.0157079632679489,AUTHORITY["EPSG","9105"]],AUTHORITY["IGNF","ATIGG"]],VERT_CS["NGF-BOURDALOUE",VERT_DATUM["NGF-BOURDALOUE",2005,AUTHORITY["IGNF","REA001"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["IGNF","BOURD"]],AUTHORITY["IGNF","ATIGG.BOURD"]]