4819=GEOGCS["Nord Sahara 1959 (Paris)",DATUM["Nord_Sahara_1959_Paris",SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465,AUTHORITY["EPSG","7012"]],TOWGS84[-209.362,-87.8162,404.62,0.0046,3.4784,0.5805,-1.4547],AUTHORITY["EPSG","6819"]],PRIMEM["Paris",2.33722917,AUTHORITY["EPSG","8903"]],UNIT["grad",0.01570796326794897,AUTHORITY["EPSG","9105"]],AUTHORITY["EPSG","4819"]]