Assessment of Using UAV Photogrammetry Based DEM and Ground-Measurement Based DEM in Computer-Assisted Forest Road Design

Computer-assisted forest road design mainly relies on a high-resolution digital elevation model (DEM) to provide terrain data for supporting the analysis of features. The resolution and accuracy DEM in representing structures varies depending preferred dataset which then reflects some essential features such as alignment, slope, earthwork. In this study, three sections were designed by using DEMs generated based UAV photogrammetry data, GNSS-GPS Total Station data. NetCAD 7.6 software, is domestic software used applications Turkiye, was perform while calculating horizontal profile, vertical curves, cross sections, generation capabilities datasets compared spatial resolution, collection processing stage. Then, differences between evaluated considering specified alignment properties, results indicated that (Unmanned Aerial Vehicles) method provided highest (10 cm), followed (56 cm) (61 methods. It found time spent 14 minutes, 70 110 minutes works respectively. On other hand, falls into disadvantageous situation stage, due high (3 hours). However, methods work only with point so they require less 15 25 lengths 294.8, 272.4 282.1 meters average slopes 3.41%, 3.39%, 3.31% UAV, GNSS-GPS, DEMs, excavation landfill volumes 369.16 m3 166.98 m3, 285.86 201.83 433.17 183.95 can be effectively roads DEMs.