proj4.defs("EPSG:5663","+proj=tmerc +lat_0=0 +lon_0=15 +k=1 +x_0=3500000 +y_0=0 +ellps=krass +towgs84=74.5,-112.5,-44.3,0,0,0,0 +units=m +no_defs +type=crs");