PROJCRS["ATF (Paris) / Nord de Guerre",
    BASEGEOGCRS["ATF (Paris)",
        DATUM["Ancienne Triangulation Francaise (Paris)",
            ELLIPSOID["Plessis 1817",6376523,308.64,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Paris RGS",2.33720833333333,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4901]],
    CONVERSION["Nord de Guerre",
        METHOD["Lambert Conic Conformal (1SP)",
            ID["EPSG",9801]],
        PARAMETER["Latitude of natural origin",55,
            ANGLEUNIT["grad",0.0157079632679489],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",6,
            ANGLEUNIT["grad",0.0157079632679489],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",0.99950908,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",500000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",300000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["easting (X)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["northing (Y)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["France - Alsace."],
        BBOX[47.42,6.84,49.07,8.23]],
    ID["EPSG",27500]]