20.500.12556/RUL-168019 Combining UAV photogrammetry and TLS for change detection on Slovenian coastal cliffs This article examines the combined use of UAV (Unmanned Aerial Vehicle) photogrammetry and TLS (Terrestrial Laser Scanning) to detect changes in coastal cliffs in the Strunjan Nature Reserve. Coastal cliffs present unique surveying challenges, including limited access, unstable reference points due to erosion, GNSS (Global Navigation Satellite System) signal obstruction, dense vegetation, private property restrictions and weak mobile data. To overcome these limitations, UAV and TLS techniques are used with the help of GNSS and TPS (Total Positioning Station) surveying to establish a network of GCPs (Ground Control Points) for georeferencing. The methodology includes several epochs of data collection between 2019 and 2024, using a DJI Phantom 4 RTK for UAV surveys and a Riegl VZ-400 scanner for TLS. The data processing includes point cloud filtering, mesh comparison and a DoD (DEM of difference) analysis to quantify cliff surface changes. This study addresses the effects of vegetation by focusing on vegetation-free regions of interest distributed across the cliff face. The results aim to demonstrate the effectiveness and limitations of both methods for detecting and monitoring cliff erosion and provide valuable insights for coastal management and risk assessment. UAV photogrammetry TLS GCP cliffs mesh comparison DEM of difference UAV fotogrametrija TLS oslonilne točke klifi primerjava 3D modelov razlika DMV true false true Angleški jezik Slovenski jezik Članek v reviji 2025-03-25 12:21:06 2025-03-25 12:21:11 2025-03-26 03:58:23 0000-00-00 00:00:00 2025 0 0 18 str. iss. 8, art. 228 Vol. 9 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 528.7 2504-446X 10.3390/drones9040228 230103555 Kregar,_Trajkovski-Combining_UAV_Photogrammetry_and_TLS_for_Change_Detection_on_Slovenian_Coastal_Cliffs.pdf Kregar,_Trajkovski-Combining_UAV_Photogrammetry_and_TLS_for_Change_Detection_on_Slovenian_Coastal_Cliffs.pdf 1 681F484E4FD9F5CBAE473A139029A06E 62802d9996ec7b57449698c269cb509e21d2b40ce3a6b276d026795234a17daf 7b6a6ea9-096b-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200994 https://www.mdpi.com/2504-446X/9/4/228 1 3a54806c-096a-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200993 Fakulteta za gradbeništvo in geodezijo 0 0 0