proj4.defs("EPSG:5221","+proj=krovak +lat_0=49.5 +lon_0=42.5 +alpha=30.2881397527778 +k=0.9999 +x_0=0 +y_0=0 +ellps=bessel +pm=ferro +towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56 +units=m +no_defs +type=crs");