Comparison of Terrestrial Photogrammetry and Terrestrial Laser Scanning for Earthquake Response Management

Vasilakos, Christos; Chatzistamatis, Stamatis; Roussou, Olga; Soulakellis, Nikolaos

doi:10.1007/978-3-030-05330-7_2

Cited by 2 publications

(3 citation statements)

References 60 publications

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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%

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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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Section: Introductionmentioning

confidence: 99%

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

Self Cite

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“…Many examples that combine TLS and UAV image point clouds can be found in the scientific literature [11,13,19,21,23,24,59,60,61,62,63]. By reviewing that literature, we discovered that only a few studies have used special targets to register point clouds.…”

Section: Introductionmentioning

confidence: 99%

New Target for Accurate Terrestrial Laser Scanning and Unmanned Aerial Vehicle Point Cloud Registration

Urbančič

Roškar²,

Fras

et al. 2019

Sensors

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The main goal of our research was to design and implement an innovative target that would be suitable for accurately registering point clouds produced from unmanned aerial vehicle (UAV) images and terrestrial laser scans. Our new target is composed of three perpendicular planes that combine the properties of plane and volume targets. The new target enables the precise determination of reference target points in aerial and terrestrial point clouds. Different types of commonly used plane and volume targets as well as the new target were placed in an established test area in order to evaluate their performance. The targets were scanned from multiple scanner stations and surveyed with an unmanned aerial vehicle DJI Phantom 4 PRO at three different altitudes (20, 40, and 75 m). The reference data were measured with a Leica Nova MS50 MultiStation. Several registrations were performed, each time with a different target. The quality of these registrations was assessed on the check points. The results showed that the new target yielded the best results in all cases, which confirmed our initial expectations. The proposed new target is innovative and not difficult to create and use.

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Comparison of Terrestrial Photogrammetry and Terrestrial Laser Scanning for Earthquake Response Management

Cited by 2 publications

References 60 publications

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

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

New Target for Accurate Terrestrial Laser Scanning and Unmanned Aerial Vehicle Point Cloud Registration

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