EPSG_23839: "+proj=tmerc +lat_0=0 +lon_0=121.5 +k=0.9999 +x_0=200000 +y_0=1500000 +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs" = '+proj=tmerc +lat_0=0 +lon_0=121.5 +k=0.9999 +x_0=200000 +y_0=1500000 +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs'
DGN95 / Indonesia TM-3 zone 51.1
metre11.4,120,-10.98,123