Well Known Text

PROJCRS["ATF (Paris) / Nord de Guerre",BASEGEOGCRS["ATF (Paris)",DATUM["Ancienne Triangulation Francaise (Paris)",ELLIPSOID["Plessis 1817",6376523,308.64,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",7027]],ID["EPSG",6901]],PRIMEM["Paris RGS",2.337208333,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],ID["EPSG",8914]],ID["EPSG",4901]],CONVERSION["Nord de Guerre",METHOD["Lambert Conic Conformal (1SP)",ID["EPSG",9801]],PARAMETER["Latitude of natural origin",55,ANGLEUNIT["grad",0.015707963267949,ID["EPSG",9105]],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",6,ANGLEUNIT["grad",0.015707963267949,ID["EPSG",9105]],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",0.99950908,SCALEUNIT["unity",1,ID["EPSG",9201]],ID["EPSG",8805]],PARAMETER["False easting",500000,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8806]],PARAMETER["False northing",300000,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8807]],ID["EPSG",19903]],CS[Cartesian,2,ID["EPSG",4499]],AXIS["Easting (X)",east],AXIS["Northing (Y)",north],LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",27500]]