INVESTIGATION OF THE ACCURACY OF A TOPOGRAPHIC PLAN MEASURED BY DIFFERENT GEODESIC INSTRUMENTS
Keywords:topographic plan, unmanned aircraft, electronic tacheometre, GPNS
The aim of this study was to determine whether an unmanned aircraft is accurate as a GPNS receiver and an electronic tacheometer. In this study, an object with an electronic tacheometer and a GPNS receiver was measured and a topographic plan was drawn with the GeoMap program. Subsequent measurments were performed with an unmanned aircraft with 143 photographs taken and 2D and 3D models modeled with AgisoftMetashape software.
Comparing the two topographies, 4 objects were selected in which it was observed that with objects that are not open and have a lot of built-up area, it is not recommended to use drones as there are a lot of shadows that obstruct the quality of the objects (e.g. tracks, roads and sites). In this case, unevennes occurs in the photo and cannot be accurately drawn.