3D Modeling using LiDAR data and its geological and geotechnical applications

Hu, Hui; Fernández-Steeger, Tomás Manuel; Dong, Mei; Nguyen, Hieu; Azzam, Rafig

doi:10.1109/geoinformatics.2010.5567796

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…The management of all this information until the terrain modeling is achieved can be done either through CAD3D programs (Hu et al 2010) or through the tools of the Geographic Information Systems. As CAD3D software, AutoCAD CIVIL3D ® will be used and as GIS software, QGIS® will be used.…”

Section: Methodsmentioning

confidence: 99%

Noise Reduction in Contour Lines and Slope Maps From Medium/High-Density Lidar Data

Peña¹,

Palacios-Ruiz²,

Santamaría-Palacios³

2021

Proceedings - 3rd Congress in Geomatics Engineering - CIGeo

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The use of medium/high-density LIDAR (Light Detection And Ranging) data for land modelling and DTM (Digital TerrainModel) is becoming more widespread. This level of detail is difficult to achieve with other means or materials. However,the horizontal and vertical geometric accuracy of the LIDAR points obtained, although high, is not homogeneous.Horizontally you can reach precisions around 30-50 cm, while the vertical precision is rarely greater than 10-15 cm. Theresult of LIDAR flights, are clouds of points very close to each other (30-60 cm) with significant elevation variations, evenif the terrain is flat. And this makes the triangulated models TIN (Triangulated Irregular Network) obtained from such LIDARdata especially chaotic. Since contour lines are generated directly from such triangulated models, their appearance showsexcessive noise, with excessively broken and rapidly closed on themselves. Getting smoothed contour liness, withoutdecreasing accuracy, is a challenge for terrain model software. In addition, triangulated models obtained from LIDAR dataare the basis for future slope maps of the land. And for the same reason explained in the previous paragraph, these slopemaps generated from high or medium density LIDAR point clouds are especially heterogeneous. Achieving uniformity andgreater adjustment to reality by reducing the natural noise of LIDAR data is another added challenge. In this paper, theproblem of excessive noise from LIDAR data of high (around 8 points/m2) and medium density (around 2 points/m2) in thegeneration of contour lines and terrain slope maps is raised and solutions are proposed to reduce this noise. All this, in thearea of specific software for the management of TIN models and GIS (Geographic Information System) and adapting thealternatives proposed by these programmes.

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Section: Methodsmentioning

confidence: 99%

Noise Reduction in Contour Lines and Slope Maps From Medium/High-Density Lidar Data

Peña¹,

Palacios-Ruiz²,

Santamaría-Palacios³

2021

Proceedings - 3rd Congress in Geomatics Engineering - CIGeo

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“…Through VR and AR, the promotion and management of geological structures and geosites acquired a dynamic character, as it became possible to monitor and visit those areas worldwide using these specific techniques [26]. A very important parameter is the transferring of the 3D geographic information into a virtual space, as it demands the produced cartographic result to be accurate and in high resolution [27,28]. In order to evaluate the accuracy of a point cloud derived from UAV-photogrammetry, authors compare it with a terrestrial laser scanner or LiDAR data [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…A very important parameter is the transferring of the 3D geographic information into a virtual space, as it demands the produced cartographic result to be accurate and in high resolution [27,28]. In order to evaluate the accuracy of a point cloud derived from UAV-photogrammetry, authors compare it with a terrestrial laser scanner or LiDAR data [26][27][28][29]. It is also suggested that even a commercial UAV can yield data suitable for measuring geomorphic changes [18].…”

Section: Introductionmentioning

confidence: 99%

DEM-Based UAV Flight Planning for 3D Mapping of Geosites: The Case of Olympus Tectonic Window, Lesvos, Greece

Papadopoulou

Vasilakos

Ζουροσ

et al. 2021

IJGI

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Geosites are an important part of geoheritage, thus their detailed mapping is crucial for their management, protection and promotion processes. However, there is no specific approach to three-dimensional (3D) mapping of geosites and a full investigation is required, considering the current advances in the science of Geoinformatics and the need for setting up an integrated system that will suggest a suitable way of mapping areas of geological significance. The main purpose of this study is to explore new approaches to the 3D mapping of geosites, where the unmanned aerial vehicles’ (UAVs) flight planning is based on the digital elevation model (DEM). The case study that is being examined is the tectonic window of Mount Olympus, located in the southeast of Lesvos island, Greece. In this paper, a methodology has been developed to create flight plans for geosite 3D mapping. This methodology consists of three main stages: a) flight planning based on SRTM-DEM, b) data acquisition and image-based 3D modelling, and c) comparison (flight plans and results). A semi-automated algorithm was developed for designing the flights, taking into account the topography of the mapped area (slope, aspect, elevation) and the final cartographic derivatives. The flight plans were compared with each other in levels of data collection, flight characteristics and their results. The results of this study are dense point clouds, DEMs and orthophotomaps. The algorithms that have been used for the comparison of point clouds were I) surface density, II) number of neighbours (NN), and III) roughness and surface profile. The conclusion drawn from this study is that the DEM is a valuable source of information that can be used in designing flight plans specially shaped on the topography of each geosite.

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“…Remote sensing is a well-established technology that includes LiDAR, INSAR, and optical photogrammetry, among others. Applicable to many different fields, there has been significant research into the use of remote sensing technologies in the geotechnical fields (6)(7)(8). These different techniques can be used stand alone or in combination with each other to determine a wide variety of useful surface characteristics of a rock slope.…”

Section: Remote Sensingmentioning

confidence: 99%

“…Using these technologies it is possible to accomplish the required tasks for transportation agencies to assess their geotechnical assets. There has been significant research on how LiDAR and photogrammetry work, and how the technologies can be applied to the geotechnical field (6)(7)(8). Each method can be applied separately, and in conjunction with one another.…”

Section: Introductionmentioning

confidence: 99%

Application of a Hazard Rating System for Rock Slopes Along a Transportation Corridor Using Remote Sensing

Justice¹

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3D Modeling using LiDAR data and its geological and geotechnical applications

Cited by 8 publications

References 8 publications

Noise Reduction in Contour Lines and Slope Maps From Medium/High-Density Lidar Data

Noise Reduction in Contour Lines and Slope Maps From Medium/High-Density Lidar Data

DEM-Based UAV Flight Planning for 3D Mapping of Geosites: The Case of Olympus Tectonic Window, Lesvos, Greece

Application of a Hazard Rating System for Rock Slopes Along a Transportation Corridor Using Remote Sensing

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