Results 1 to 10 of about 874 (206)

Assessing Geomorphic Change in Restored Coastal Dune Ecosystems Using a Multi-Platform Aerial Approach

Remote Sensing, 2021
Uncrewed aerial systems (UAS) provide an effective method to examine geomorphic and vegetation change in restored coastal dune ecosystems. Coupling structure-from-motion (SfM) photogrammetry with RGB orthomosaic imagery allows researchers to characterize
Zach Hilgendorf, M. Colin Marvin, Craig M. Turner, Ian J. Walker   +3 more
doaj   +3 more sources

AIRBORNE LASER SCANNING CHANGE DETECTION FOR QUANTIFYING GEOMORPHOLOGICAL PROCESSES IN HIGH MOUNTAIN REGIONS [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Disturbance by geomorphic processes is a key factor for current and potential plant species distributions in high mountain regions. We implemented and tested an approach for the detection, quantification, and geomorphological classification of 3D ...
L. Müller, M. Rutzinger, A. Mayr, A. Kollert   +3 more
doaj   +1 more source

Change Detection Applications in the Earth Sciences Using UAS-Based Sensing: A Review and Future Opportunities

Drones, 2023
Over the past decade, advancements in collection platforms such as unoccupied aerial systems (UAS), survey-grade GNSS, sensor packages, processing software, and spatial analytical tools have facilitated change detection analyses at an unprecedented ...
Christian G. Andresen, Emily S. Schultz-Fellenz   +1 more
doaj   +1 more source

The Use of UAVs for the Characterization and Analysis of Rocky Coasts

Drones, 2021
Rocky coasts represent three quarters of all coastlines worldwide. These areas are part of ecosystems of great ecological value, but their steep configuration and their elevation make field surveys difficult.
Alejandro Gómez-Pazo, Augusto Pérez-Alberti   +1 more
doaj   +1 more source

Volumetric change analysis of the Cauvery delta topography using radar remote sensing

Egyptian Journal of Remote Sensing and Space Sciences, 2022
Geomorphology refers to the study of the Earth’s physical land surface features. Digital Elevation Model (DEM) is a digital imagery where each pixel represents elevation value above or below mean sea level.
Sambandan Rajakumari, Renganathan Mahesh, Kaladevi Jayadevan Sarunjith, Ramachandran Ramesh   +3 more
doaj   +1 more source

Using UAS-Aided Photogrammetry to Monitor and Quantify the Geomorphic Effects of Extreme Weather Events in Tectonically Active Mass Waste-Prone Areas: The Case of Medicane Ianos

Applied Sciences, 2023
Extreme weather events can trigger various hydrogeomorphic phenomena and processes including slope failures. These shallow instabilities are difficult to monitor and measure due to the spatial and temporal scales in which they occur.
Evelina Kotsi, Emmanuel Vassilakis, Michalis Diakakis, Spyridon Mavroulis, Aliki Konsolaki, Christos Filis, Stylianos Lozios, Efthymis Lekkas   +7 more
doaj   +1 more source

Evaluating Elevation Change Thresholds between Structure-from-Motion DEMs Derived from Historical Aerial Photos and 3DEP LiDAR Data

Remote Sensing, 2020
This study created digital terrain models (DTMs) from historical aerial images using Structure from Motion (SfM) for a variety of image dates, resolutions, and photo scales.
Peter Chirico, Jessica DeWitt, Sarah Bergstresser   +2 more
doaj   +1 more source

A comparison of structure from motion photogrammetry and the traversing micro-erosion meter for measuring erosion on shore platforms [PDF]

Earth Surface Dynamics, 2018
For decades researchers have used the micro-erosion meter and its successor the traversing micro-erosion meter to measure micro-scale rates of vertical erosion (downwearing) on shore platforms.
N. D. Cullen, A. K. Verma, M. C. Bourke
doaj   +1 more source

Monitoring Geomorphic Change and Catchment Sediment Production to Understand the Erosive Dynamics in a Gullied Channel by Means of High-Resolution DEMs

Proceedings, 2020
Gully erosion in valley bottoms is a frequent process with negative consequences in the dehesa environment. Soil loss, decrease of soil and descend in biomass are among the negative aftereffect of gully erosion processes.
Alberto Alfonso-Torreño, Álvaro Gómez-Gutiérrez, Susanne Schnabel, J. Francisco Lavado Contador, Manuel Pulido Fernández, Jesús Barrena-González   +5 more
doaj   +1 more source

Short Communication: A simple workflow for robust low-cost UAV-derived change detection without ground control points [PDF]

Earth Surface Dynamics, 2019
High-quality 3-D point clouds generated from repeat camera-equipped unmanned aerial vehicle (UAV) surveys are increasingly being used to investigate landscape changes and geomorphic processes.
K. L. Cook, M. Dietze
doaj   +1 more source