proj4.defs("EPSG:2631","+proj=tmerc +lat_0=0 +lon_0=165 +k=1 +x_0=500000 +y_0=0 +ellps=krass +towgs84=926.4,-715.9,-186.4,-10.364,-20.78,26.452,-7.224 +units=m +no_defs +type=crs");