DATUM["System_of_the_Unified_Trigonometrical_Cadastral_Network_Ferro",SPHEROID["Bessel 1841",6377397.155,299.1528128,AUTHORITY["EPSG","7004"]],AUTHORITY["EPSG","6818"]],PRIMEM["Ferro",-17.6666666666667,AUTHORITY["EPSG","8909"]]