+proj=tmerc +lat_0=0 +lon_0=21 +k=0.9999 +x_0=500000 +y_0=-4000000 +ellps=bessel +towgs84=524.442,3.275,519.002,0.013287,-3.119714,10.232693,4.184981 +units=m +no_defs +type=crs