Combining UAV photogrammetry and TLS for change detection on Slovenian coastal cliffs

Kregar, Klemen (avtor), Kozmus Trajkovski, Klemen (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: UAV photogrammetry, TLS, GCP, cliffs, mesh comparison, DEM of difference
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 18 str.
• Številčenje: Vol. 9, iss. 8, art. 228
• PID: 20.500.12556/RUL-168019
• UDK: 528.7
• ISSN pri članku: 2504-446X
• DOI: 10.3390/drones9040228
• COBISS.SI-ID: 230103555
• Datum objave v RUL: 25.03.2025

Gradivo je del revije

• Naslov: Drones
• Skrajšan naslov: Drones
• Založnik: MDPI AG
• ISSN: 2504-446X
• COBISS.SI-ID: 529755417

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: UAV fotogrametrija, TLS, oslonilne točke, klifi, primerjava 3D modelov, razlika DMV

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0227
• Naslov: Geoinformacijska infrastruktura in trajnostni prostorski razvoj Slovenije

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: J1-2477
• Naslov: Erozijski procesi na obalnih flišnih klifih z oceno tveganja