GGRS87 / Greek Grid 2100 GGRS87 4121 ellipsoidal 6402 Geodetic latitude 9901 Lat north Geodetic longitude 9902 Lon east Greek_Geodetic_Reference_System_1987 6121 Greenwich 8901 0 GRS 1980 7019 6378137 298.257222101 0 24 0.9996 500000 0 Cartesian 4400 Easting 9906 E east Northing 9907 N north