Comparison of real time GPS (RTK GPS) and electronical measuring techniques in cadastral measurements

With continual research and development into GPS, the techniques and systems developed have become more reliable, cheaper and more productive, making GPS more attractive for a range of surveying solutions. The question then arises that if RTK-GPS is now accurate and viable enough to compete with Total Station methods, can this new technology be used for boundary surveys, most notably boundary definitions and redefinitions. RTK is a process where GPS signal corrections are transmitted in real time from a reference receiver at a known location to one or more remote rover receivers. The use of an RTK capable GPS system can compensate for atmospheric delay, orbital errors and other variables in GPS geometry, increasing positioning accuracy up to within a centimeter. Used by engineers, topographers, surveyors and other professionals, RTK is a technique employed in applications where precision is paramount. RTK is used, not only as a precision positioning instrument, but also as a core for navigation systems or automatic machine guidance, in applications such as civil engineering and dredging. It provides advantages over other traditional positioning and tracking methods, increasing productivity and accuracy. Using the code phase of GPS signals, as well as the carrier phase, which delivers the most accurate GPS information, RTK provides differential corrections to produce the most precise GPS positioning. Keywords: GPS, RTK GPS, carrier-phase, cadastral measurement, terrestrial measurement, accuracy.