Geomorphological mapping with a small unmanned aircraft system (sUAS): Feature detection and accuracy assessment of a photogrammetrically-derived digital terrain model

Hugenholtz, Chris H.; Whitehead, Ken; Brown, Owen W.; Barchyn, Thomas E.; Moorman, Brian J.; LeClair, Adam; Riddell, Kevin; Hamilton, Tayler Kaylen

doi:10.1016/j.geomorph.2013.03.023

Cited by 298 publications

(215 citation statements)

References 32 publications

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“…Easy-to-use, off-theshelf software is now capable of processing large UAV image collections to derive orthomosaics and dense photogrammetric point clouds for the generation of DEMs. By integrating these data with differential GPS surveyed ground control points (GCPs), it is possible to generate DEMs with a ground resolution of under 5 cm and orthomosaics of around 2 cm resolution (Harwin and Lucieer, 2012;Hugenholtz et al, 2013). Accuracy of these datasets has been demonstrated to be very high in comparison to survey data and often equal or better than lidar (Harwin and Lucieer, 2012;Hugenholtz et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Wigmore

Mark

2017

The Cryosphere

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Abstract. The glaciers of the Cordillera Blanca, Peru, are rapidly retreating and thinning as a result of climate change, altering the timing, quantity and quality of water available to downstream users. Furthermore, increases in the number and size of proglacial lakes associated with these melting glaciers is increasing potential exposure to glacier lake outburst floods (GLOFs). Understanding how these glaciers are changing and their connection to proglacial lake systems is thus of critical importance. Most satellite data are too coarse for studying small mountain glaciers and are often affected by cloud cover, while traditional airborne photogrammetry and lidar are costly. Recent developments have made unmanned aerial vehicles (UAVs) a viable and potentially transformative method for studying glacier change at high spatial resolution, on demand and at relatively low cost.Using a custom designed hexacopter built for high-altitude (4000-6000 m a.s.l.) operation, we completed repeat aerial surveys (2014 and 2015) of the debris-covered Llaca Glacier tongue and proglacial lake system. High-resolution orthomosaics (5 cm) and digital elevation models (DEMs) (10 cm) were produced and their accuracy assessed. Analysis of these datasets reveals highly heterogeneous patterns of glacier change. The most rapid areas of ice loss were associated with exposed ice cliffs and meltwater ponds on the glacier surface. Considerable subsidence and low surface velocities were also measured on the sediments within the pro-glacial lake, indicating the presence of extensive regions of buried ice and continued connection to the glacier tongue. Only limited horizontal retreat of the glacier tongue was observed, indicating that measurements of changes in aerial extent alone are inadequate for monitoring changes in glacier ice quantity.

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Section: Introductionmentioning

confidence: 99%

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Wigmore

Mark

2017

The Cryosphere

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“…Lejot et al (2007) realized early the high potential of DEM generated by drone-based photogrammetry when investigating hydrologic networks, channel featurees, water depth, etc., while Bishop et al (2011) used geomorphic data and simple laws of hydrology to analyse drainage basins, in order to create realistic simulation of river channels, sediment transport and their storage. Following these findings, Hugenholtz et al (2013) demonstrated that the DEM accuracy resulting from overlapping drone images obtained by photogrammetry is appropriate for geomorphologic studies.…”

Section: Introductionmentioning

confidence: 75%

Indirect field technology for detecting areas object of illegal spills harmful to human health: application of drones, photogrammetry and hydrological models

et al. 2014

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Abstract. The accumulation of heavy metals in agricultural soils is a serious environmental problem. The Campania region in southern Italy has higher levels of cancer risk, presumably due to the accumulation of geogenic and anthropogenic soil pollutants, some of which have been incorporated into organic matter. The aim of this study was to introduce and test an innovative, field-applicable methodology to detect heavy metal accumulation using drone-based photogrammetry and microrill network modelling, specifically to generate wetlands wetlands prediction indices normally applied at large catchment scales, such as a large geographic basin. The processing of aerial photos taken using a hexacopter equipped with fifth-generation software for photogrammetry allowed the generation of a digital elevation model (DEM) with a resolution as high as 30 mm. Not only this provided a high potential for the study of micro-rill processes, but it was also useful for testing and comparing the capability of the topographic index (TI) and the clima-topographic index (CTI) to predict heavy metal sedimentation points at scales from 0.1 to 10 ha. Our results indicate that the TI and CTI indices can be used to predict points of heavy metal accumulation for small field catchments.

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“…Analizy geomorfologiczne wykorzystują modele w celach badania procesów kształtujących powierzchnię Ziemi, np. trzęsienia ziemi, powstawanie osuwisk [1, [3][4][5]. W zagadnieniach ekologicznych mogą być wykorzystane do badań rozmieszczenia, wysokości i budowy roślinności [6].…”

Section: Wprowadzenieunclassified

Application of Selected Methods of Generating Regular Terrain Models from Airborne Laser Scanning for Environmental Research

Rozpondek

Wancisiewicz

2017

Eng. Prot. Environ.

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The accuracy of models representing the shape of the land surface is important in environmental studies. Accurate model can be used to detect even small changes in the landform and landuse, as well as to develop a spatial model of water and soil pollution. Due to the fact that environmental studies are carried out on diversified areas in terms of landuse, this study indicated the appropriate methods for generating Digital Terrain Model (DTM) and Digital Surface Model (DSM). Both of them can be used in processes and analyzes research. Those analyzes mainly take into account the formation of the Earth's surface in the context of hydrological, geomorphological and biological modeling. The example of practical use of hydrological modeling is a ISOK project, which goal is to reduce the danger and minimize losses caused by the floods. The main aim of this study was to select the appropriate method of generating regular models from airborne laser scanning. The data on which analysis was performed, were obtained for the area of Cracow city within the project ISOK. To achieve this goal, four methods available in ArcGIS, were selected: nearest neighbour, inverse distance weighted, triangulation with linear interpolation and triangulation with natural neighbour interpolation. Additionally several different sizes of the cell of regular model were selected: 0.125, 0.25, 0.5, 1, 2.5, 5 m. Each generated model has been studied in terms of a accuracy (Gaussian statistical model was used). Firstly the analysis was made for digital terrain model and digital surface model for one archive module of point cloud. For this stage, 48 models were generated. After that, the area of analysis was expanded. Because of similar results obtained by both triangulations methods in the first stage, only the method of triangulation with linear interpolation was studied. In the second stage of research, 54 models were generated for other archive modules of point cloud. The results of the two stages were compatible. It has been noticed that the nearest neighbour method is the most accurate for generating Digital Surface Models.

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Geomorphological mapping with a small unmanned aircraft system (sUAS): Feature detection and accuracy assessment of a photogrammetrically-derived digital terrain model

Cited by 298 publications

References 32 publications

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Indirect field technology for detecting areas object of illegal spills harmful to human health: application of drones, photogrammetry and hydrological models

Application of Selected Methods of Generating Regular Terrain Models from Airborne Laser Scanning for Environmental Research

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