proj4.defs("EPSG:23841","+proj=tmerc +lat_0=0 +lon_0=127.5 +k=0.9999 +x_0=200000 +y_0=1500000 +ellps=WGS84 +towgs84=-0.2773,0.0534,0.4819,0.0935,-0.0286,0.00969,-0.028 +units=m +no_defs +type=crs");