proj4.defs("EPSG:2612","+proj=tmerc +lat_0=0 +lon_0=108 +k=1 +x_0=500000 +y_0=0 +ellps=krass +towgs84=21.53219,-97.00027,-60.74046,-0.99548,-0.58147,-0.2418,-4.5981 +units=m +no_defs +type=crs");