photogrammetry

Unmanned Aerial Vehicle-Based Mapping of Turf-Banked Solifluction Lobe Movement and Its Relation to Material, Geomorphometric, Thermal and Vegetation Properties

Solifluction is one of the most widespread periglacial processes with low annual movement rates in the range of millimeters to centimeters. Traditional methods to assess solifluction movement usually have low spatial resolution, which hampers our …

UAV Data as Alternative to Field Sampling to Map Woody Invasive Species Based on Combined Sentinel-1 and Sentinel-2 Data

Invasive plant species can pose major threats to biodiversity, ecosystem functioning and services. Satellite based remote sensing has evolved as an important technology to spatially map the occurrence of invasive species in space and time. With the …

Pilot Study on the Retrieval of DBH and Diameter Distribution of Deciduous Forest Stands Using Cast Shadows in UAV-Based Orthomosaics

One fundamental metric to characterize trees and forest stands is the diameter at breast height (DBH). However, the vertical geometry of tree stems hampers a direct measurement by means of orthographic aerial imagery. Nevertheless, the DBH in …