Reconstruction of extreme topography from UAV structure from motion photogrammetry
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Agüera Vega, Francisco; Carvajal Ramírez, Fernando; Martínez Carricondo, Patricio Jesús; Sánchez-Hermosilla López, Julián; Mesas Carrascosa, Francisco Javier; [et al.]Fecha
2018Resumen
The development of unmanned aerial vehicle photogrammetry over the last decade has allowed terrain that is
very difficult for humans to access to be captured at very high spatial and temporal resolutions. This paper deals
with the application of this technique to the study of extreme topography in a near-vertical road cut-slope. Three
photogrammetric projects were carried out: one derived from images taken with the camera oriented horizontally,
one derived from images taken with the camera tilted at 45°, and one derived from both sets of images.
Point clouds and orthophotos were generated for each of these projects. The best accuracies were achieved by
the photogrammetric products derived from the combined images set, which had RMSE equal to 0.053 m,
0.070m and 0.061m in X, Y and Z direction, respectively. A software program was developed to generate
contour lines and cross-sections derived from the point cloud, which was able to represent all terrain geometric
characteristics...
Palabra/s clave
Unmanned aerial vehicle (UAV)
UAV photogrammetry
Structure from motion (SfM)
Cut slope
Extreme topograpy
Landslide