proj4.defs("EPSG:31257","+proj=tmerc +lat_0=0 +lon_0=10.3333333333333 +k=1 +x_0=150000 +y_0=-5000000 +ellps=bessel +towgs84=601.705,84.263,485.227,-4.7354,-1.3145,-5.393,-2.3887 +units=m +no_defs +type=crs");