Analysis of Topographic Surveys with RPAS in Steep Coastal Dunes

Francisco Contreras- de-Villar, Francisco J. García, Juan J. Muñoz-Perez (), Antonio Contreras- de-Villar, Verónica Ruiz-Ortiz, Patricia López-García and Bismark Jigena-Antelo
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Francisco Contreras- de-Villar: Department of Industrial and Civil Engineering, University of Cadiz, Av. Ramon Puyol s/n, 11202 Algeciras, Spain
Francisco J. García: Urbing-Lab Diseño y Gestion, Calle Cabo Noval, 6-PISO 3 B, 52005 Melilla, Spain
Juan J. Muñoz-Perez: CASEM, University of Cadiz, 11510 Puerto Real, Spain
Antonio Contreras- de-Villar: Department of Industrial and Civil Engineering, University of Cadiz, Av. Ramon Puyol s/n, 11202 Algeciras, Spain
Verónica Ruiz-Ortiz: Department of Industrial and Civil Engineering, University of Cadiz, Av. Ramon Puyol s/n, 11202 Algeciras, Spain
Patricia López-García: CASEM, University of Cadiz, 11510 Puerto Real, Spain
Bismark Jigena-Antelo: CASEM, University of Cadiz, 11510 Puerto Real, Spain

Land, 2023, vol. 12, issue 9, 1-15

Abstract: The current use of photogrammetric systems with RPAS (remotely piloted aircraft systems) for the acquisition of topographic data in every type of coastal area has the benefit of a low risk for the personnel involved, good precision, increased productivity, and lower costs. However, their accuracy has not yet been researched in areas with steep terrain. In this paper, we study dune areas with slopes between 20 and 30%. The objective of this work is to examine the influence of the inclination of both the flight and the camera and to compare the results with those obtained using constant-height flights. With the data collected during three field campaigns, a total of 18 cases were studied. Among the results obtained, in the case of the horizontal flights, a vertical error of 0.048 m was detected for a 0° inclination of the camera versus an error of 0.086 m for a 10° inclination, thus an increase in the camera inclination decreased the accuracy by 44%. Moreover, the flight inclination did not lead to a significant reduction in the error. Therefore, as a main conclusion, the planning of horizontal flights as well as the non-tilt of the camera are recommended.

Keywords: RPAS; UAV; inclined camera; non-horizontal flight; steep terrain; vertical error (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2023
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