proj4.defs("EPSG:6246","+proj=col_urban +lat_0=10.9231830833333 +lon_0=-74.8343313333333 +x_0=917264.406 +y_0=1699839.935 +h_0=100 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");