Geomorphic Change Detection Using Cost-Effective Structure-from-Motion Photogrammetry: Evaluation of Direct Georeferencing from Consumer-Grade UAS at Orewa Beach (New Zealand)
| Autor: | Patrice Delmas, Benjamin Levy, Stephane Bertin, Trevor Gee |
|---|---|
| Přispěvatelé: | Laboratoire Géosciences Océan (LGO), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Department of Computer Science [Auckland], University of Auckland [Auckland], Université de Brest (UBO)-Université de Bretagne Sud (UBS)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
| Rok vydání: | 2020 |
| Předmět: |
Photogrammetry
010504 meteorology & atmospheric sciences [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Georeference Structure from motion Computers in Earth Sciences 010502 geochemistry & geophysics 01 natural sciences Geology Change detection 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Photogrammetric engineering and remote sensing Photogrammetric engineering and remote sensing, Asprs American Society for Photogrammetry and, 2020, 86, pp.289-298. ⟨10.14358/pers.86.5.289⟩ |
| ISSN: | 0099-1112 |
| DOI: | 10.14358/pers.86.5.289 |
| Popis: | Unmanned aerial systems (UAS) and structure-from-motion photogrammetry are transforming the way we produce topo- graphic data, with applications covering many disciplines in the geosciences, including coastal studies. To overcome limitations of ground control points (GCPs), we evaluate direct georeferencing (DG) of consumer UAS imagery for the cost-effective measurement of beach topography. Using DG, camera positions determined with on-board instruments provide air control points for photogrammetry, obviating the need for presurveyed GCPs. We validate the approach at Orewa Beach, New Zealand, achieving vertical accuracies similar to light detection and ranging (< 0.2 m) at a higher resolution (< 0.1 m). A low-quality global navigation satellite system onboard a consumer UAS remains the main constraint on measurement quality. We show how independent topo- graphic data sets, which are increasingly available world- wide, can improve measurement quality, and hence change detection capacity. Our understanding of measurement quality achieved in this study is applied to the assessment of morphological and volumetric change at Orewa Beach. |
| Databáze: | OpenAIRE |
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