EPSG_21336: "+proj=tmerc +lat_0=0 +lon_0=108 +k=1 +x_0=250000 +y_0=0 +ellps=GSK2011 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs" = '+proj=tmerc +lat_0=0 +lon_0=108 +k=1 +x_0=250000 +y_0=0 +ellps=GSK2011 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs'
GSK-2011 / GSK 3GK CM 108E
metre178.4,106.5,49.25,109.5