proj4.defs("EPSG:28992","+proj=sterea +lat_0=52.1561605555556 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +towgs84=565.04,49.91,465.84,1.9848,-1.7439,9.0587,4.0772 +units=m +no_defs +type=crs");