Investigation of accuracy of detailed verified by unmanned aerial vehicles with RTK system; The example of Ortakent-Bodrum Area

Abstract

There has always been a sense of adoption of human beings and the knowledge to define their types, boundaries and areas, especially in terms of the immovables they own. It is known from past to present those measurements are difficult and require effort and time. However, with the developing technology, measuring systems have been renewed and new methods have emerged. With the new systems, project time and cost savings were achieved. Although the production of orthometric maps has accelerated thanks to the advances in remote sensing and photogrammetry, their accuracy compared to terrestrial measurements is questioned. In this study, it is aimed to investigate whether there are differences between the location information of the orthometric map produced by Unmanned Aerial Vehicles (UAV) and the location information of the data produced by Global Navigation Satellite Systems (GNSS), and to investigate the reasons for these differences, if any. The study area covers in Ortakent, Bodrum-Muğla. One of the most important features of the UAV used in the project is that it has a Real Time Kinematic GNSS system (RTK-GNSS). After measuring with UAV, the Digital Surface Model and orthophoto was produced. After the measurements made with the GNSS, triangulation was made and the undulations were subtracted and orthometric heights were obtained. Thus, the differences between the obtained values ​​were determined by measuring with both the UAV and the GNSS system. These differences are very small like cm. It has been seen that the photogrammetric values ​​created with Ground Control Points are more accurate than the photogrammetric values ​​created without Ground Control Points.