proj4.defs("EPSG:2171","+proj=sterea +lat_0=50.625 +lon_0=21.0833333333333 +k=0.9998 +x_0=4637000 +y_0=5647000 +ellps=krass +towgs84=2.3287,-147.0425,-92.0802,0.3092483,-0.32482185,-0.49729934,5.68906266 +units=m +no_defs +type=crs");