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DEM Generation from Fixed-Wing UAV Imaging and LiDAR-Derived Ground Control Points for Flood Estimations

1
Grupo de Investigación GISA, Facultad de Ingeniería, Universidad de La Guajira, Km 5 Vía a Maicao, Riohacha 440007, Colombia
2
Escuela Técnica Superior de Ingenieros de Minas y Energía, Universidad Politécnica de Madrid. Departamento de Explotación de Recursos Minerales y Obras Subterráneas. C/ Ríos Rosas, 21, 28003 Madrid, Spain
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(14), 3205; https://doi.org/10.3390/s19143205
Received: 15 June 2019 / Revised: 16 July 2019 / Accepted: 17 July 2019 / Published: 20 July 2019
(This article belongs to the Special Issue Urban Remote Sensing and Sustainable Development)
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Abstract

Geospatial products, such as digital elevation models (DEMs), are important topographic tools for tackling local flood studies. This study investigates the contribution of LiDAR elevation data in DEM generation based on fixed-wing unmanned aerial vehicle (UAV) imaging for flood applications. More specifically, it assesses the accuracy of UAV-derived DEMs using the proposed LiDAR-derived control point (LCP) method in a Structure-from-Motion photogrammetry processing. Also, the flood estimates (volume and area) of the UAV terrain products are compared with a LiDAR-based reference. The applied LCP-georeferencing method achieves an accuracy comparable with other studies. In addition, it has the advantage of using semi-automatic terrain data classification and is readily applicable in flood studies. Lastly, it proves the complementarity between LiDAR and UAV photogrammetry at the local level. View Full-Text
Keywords: UAV; fixed-wing; LiDAR; ground control point; DEM; accuracy; floods UAV; fixed-wing; LiDAR; ground control point; DEM; accuracy; floods
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Escobar Villanueva, J.R.; Iglesias Martínez, L.; Pérez Montiel, J.I. DEM Generation from Fixed-Wing UAV Imaging and LiDAR-Derived Ground Control Points for Flood Estimations. Sensors 2019, 19, 3205.

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