topoğrapy is coordinat axis calculation system...its locale and world axıs using anymore...new segment many years before setup to hand gps located and apply points...another amterials AUTOCAD AND NETCAD PROGRAMS wits use calculators the using GPS OR TOTAL STATİON AND NİVO... PROJECT BEFORE SCALE PUT İT UP TO UP 2 POİNT İN CONVERT AND AFTER LİSTED COORDS GO TO AREA AND APPLY