EPSG_2424: "+proj=tmerc +lat_0=0 +lon_0=81 +k=1 +x_0=500000 +y_0=0 +ellps=krass +towgs84=15.8,-154.4,-82.3,0,0,0,0 +units=m +no_defs +type=crs" = '+proj=tmerc +lat_0=0 +lon_0=81 +k=1 +x_0=500000 +y_0=0 +ellps=krass +towgs84=15.8,-154.4,-82.3,0,0,0,0 +units=m +no_defs +type=crs'
Beijing 1954 / 3-degree Gauss-Kruger CM 81E
metre145.88,79.5,29.95,82.51