Abstract
AbstractRemotely piloted aerial systems (RPASs) are gaining fast and wide application around the world due to its relative low-cost advantage in the acquisition of high-resolution imagery. However, standardized protocols for the construction of cartographic products are needed. The aim of this paper is to optimize the generation of digital terrain models (DTMs) by using different RPAS flight parameters. An orthogonal design L18 was used to measure the effect of photogrammetric flight parameters on the DTM generated. The image data were acquired using a DJI Phantom 4 Pro drone and six flight parameters were evaluated: flight mode, altitude, flight speed, camera tilt, longitudinal overlap and transversal overlap. Fifty-one ground control points were established using a global positioning system. Multivision algorithms were used to obtain ultra-high resolution point clouds, orthophotos and 3D models from the photos acquired. Root mean square error was used to measure the geometric accuracy of DTMs generated. The effect of photogrammetric flight parameters was carried out by using analysis of variance statistical analysis. Altimetric and planimetric accuracies of 0.38 and 0.11 m were achieved, respectively. Based on these results, high-precision cartographic material was generated using low-cost technology.
Highlights
Digital elevation model (DEM) is a 3D graphical representation of the terrain surface, which allowsThis work is licensed under the Creative Commons AttributionZuriel Dathan Mora-Felix et al.describing its morphology (digital terrain model (DTM)) and the anthropogenic elements or the vegetation present on digital surface model (DSM)
Conventional remotely piloted aerial systems (RPAS) photogrammetry is considered as an economic alternative and it is capable of extracting images to build highdetailed surface models that are very useful for scientific research [7]
This research provides a low-cost, high precision and easy-to-operate DEM acquisition and construction methodology using RPAS photogrammetry, useful for regions where there are no sufficient resources to develop this type of cartographic products
Summary
Digital elevation model (DEM) is a 3D graphical representation of the terrain surface, which allowsThis work is licensed under the Creative Commons AttributionZuriel Dathan Mora-Felix et al.describing its morphology (digital terrain model (DTM)) and the anthropogenic elements or the vegetation present on digital surface model (DSM). Conventional remotely piloted aerial systems (RPAS) photogrammetry is considered as an economic alternative and it is capable of extracting images to build highdetailed surface models that are very useful for scientific research [7]. According to Uysal et al [8], RPAS photogrammetry is a robust technology for topographic mapping and modeling with several advantages such as cost reduction, easy access to complicated areas, reduced operation times and field activities, among others. This technology can compete with others that can develop high detail DEMs [9]
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