Unexpected Lambert Conformal Conic 1SP

var proj4 = require("proj4") const wkt = `PROJCS["NTF (Paris) / Lambert Nord France", GEOGCS["NTF (Paris)", DATUM["Nouvelle_Triangulation_Francaise_Paris", SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936269, AUTHORITY["EPSG","7011"]], TOWGS84[-168,-60,320,0,0,0,0], AUTHORITY["EPSG","6807"]], PRIMEM["Paris",2.33722917, AUTHORITY["EPSG","8903"]], UNIT["grad",0.01570796326794897, AUTHORITY["EPSG","9105"]], AUTHORITY["EPSG","4807"]], PROJECTION["Lambert_Conformal_Conic_1SP"], PARAMETER["latitude_of_origin",55], PARAMETER["central_meridian",0], PARAMETER["scale_factor",0.999877341], PARAMETER["false_easting",600000], PARAMETER["false_northing",200000], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AXIS["X",EAST], AXIS["Y",NORTH], AUTHORITY["EPSG","27561"]]`; const point = [712434.0930000528, 281096.2019974801]; const wktFunc = proj4(wkt, 'EPSG:4326'); proj4Def = "+proj=lcc +lat_1=49.50000000000001 +lat_0=49.50000000000001 +lon_0=0 +k_0=0.999877341 +x_0=600000 +y_0=200000 +a=6378249.2 +b=6356515 +towgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m +no_defs" const proj4Func = proj4(proj4Def, 'EPSG:4326'); const transformPoint = () => { const badOne = wktFunc.forward(point); const goodOne = proj4Func.forward(point); return { badOne, goodOne } } transformPoint()