Sierra Leone 1968 / UTM zone 28N 2161 Sierra Leone 1968 4175 ellipsoidal 6402 Geodetic latitude 9901 Lat north Geodetic longitude 9902 Lon east Sierra_Leone_1968 6175 Greenwich 8901 0 Clarke 1880 (RGS) 7012 6378249.145 293.465 0 -15 0.9996 500000 0 Cartesian 4400 Easting 9906 E east Northing 9907 N north