proj4.defs("EPSG:5663","+proj=tmerc +lat_0=0 +lon_0=15 +k=1 +x_0=3500000 +y_0=0 +ellps=krass +towgs84=2.329,-147.042,-92.08,0.309,-0.325,-0.497,5.69 +units=m +no_defs +type=crs");