Hanoi 1972 / Gauss-Kruger zone 18 2044 Hanoi 1972 4147 ellipsoidal 6402 Geodetic latitude 9901 Lat north Geodetic longitude 9902 Lon east Hanoi_1972 6147 Greenwich 8901 0 Krassowsky 1940 7024 6378245 298.3 0 105 1 18500000 0 Cartesian 4400 Easting 9906 E east Northing 9907 N north