proj4.defs("EPSG:3415","+proj=lcc +lat_0=21 +lon_0=114 +lat_1=18 +lat_2=24 +x_0=500000 +y_0=500000 +ellps=WGS72 +towgs84=0,0,1.9,0,0,0.814,-0.38 +units=m +no_defs +type=crs");