Accuracy Evaluation of Orthophoto Maps Obtained by UAV Systems
Abstract
Unmanned Aerial Vehicles (UAV), which is one of the most important gains of the developing technology, was firstly used for military purposes, but soon became an important issue of our daily life. In addition to the ability to produce three-dimensional spatial information with the UAV, it provides less labor, time and cost advantage compared to conventional measurement methods, playing an important role in the spread of UAV usage. UAV systems, whose usage are becoming widespread and diverse day by day, are in a continuous development to meet the high accuracy requirements, especially for surveying activities. For this reason, UAV hardware and software features are also constantly developing. In this study, firstly, the accuracy comparisons of the data sets based on the UAV with GNSS-RTK and the UAV without this feature were studied. Later, the accuracy comparisons of the data sets processed by Pix4D Mapper and Agisoft FotoScan photogrammetry software. As a result of the comparisons, it was seen that the horizontal and vertical accuracy values obtained for the UAV data with GNSS-RTK were better than the horizontal and vertical accuracy values obtained for other UAV data. When the software were evaluated among themselves, it was seen that the horizontal and vertical accuracy of the data sets obtained with Pix4D Mapper software was better. On the other hand, while Agisoft FotoScan software gives better results in horizontal position accuracy of data sets based on UAV without GNSS-RTK, Pix4D Mapper software gives better results in vertical position accuracy of those.
Keywords
Agisoft FotoScan , Unmanned Aerial Vehicle (UAV) , Pix4D Mapper
Kaynakça
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