proj4.defs("EPSG:5683","+proj=tmerc +lat_0=0 +lon_0=9 +k=1 +x_0=3500000 +y_0=0 +ellps=bessel +towgs84=584.9636,107.7175,413.8067,-1.1155,-0.2824,3.1384,7.9922 +units=m +no_defs +type=crs");