Study on High Accuracy Topographic Mapping via UAV-based Images

Chi, Yun-Yao; Lee, Ya-Fen; Tsai, Shang-En

doi:10.1088/1755-1315/44/3/032006

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…UAV technology is equipped with an RGB camera integrated with a multispectral sensor and LiDAR sensor. It is able to give accurate readings [116][117][118]. The combination of UAV and LiDAR provides excellent data [21].…”

Section: Limitationsmentioning

confidence: 99%

Perceived Usefulness of Airborne LiDAR Technology in Road Design and Management: A Review

et al. 2021

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Airborne light detection and ranging (LiDAR) surveying technology plays an important role in road design, and it is increasingly implemented in the design stage. The ability of LiDAR as a remote sensing technology to be used in non-accessible places (i.e., hilly terrain, steep slope) makes it a powerful tool, and it has the potential to provide benefits that simplify existing design processes for designers and practitioners. This paper reviews the application of airborne LiDAR in road design and factors including items from the perceived usefulness of technology. The context of the future direction of LiDAR technology is highlighted in civil engineering road design, roadway inspection and as-built documentation. The implementation of this technology is expected to assist the end-users in developing more manageable planning for road construction and thus to ensure the usage of LiDAR technology is enhanced from time to time, especially in Malaysia.

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Section: Limitationsmentioning

confidence: 99%

Perceived Usefulness of Airborne LiDAR Technology in Road Design and Management: A Review

et al. 2021

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“…The utilization of UAVs presents a promising solution for the acquisition of multi-temporal aerial stereo photos and high-resolution digital surface models [Chi et al, 2016]. Therefore, by leveraging UAVs and having a sufficient number of Ground Control Points (GCPs), it is anticipated that accurate local geoid modelling can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Modelling local geoid undulations using unmanned aerial vehicles (UAVS): a case study of the Federal University of Technology, Akure, Nigeria

Raufu,

Tata,

Olaosegba

2023

ISTCGCAP

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The study was aimed at developing a geoid model using Unmanned Aerial Vehicle (UAV) technology. To accomplish this, a UAV was deployed to capture imagery of the study area from a height of 150m, with a ground resolution of 4.19cm. A total of 3737 images were obtained, covering an area of 725.804 hectares. The existing ellipsoidal and orthometric heights were used to georeferenced the acquired images. For the analysis, 35 points were utilized, with 20 points designated as ground control points (GCPs) and the remaining 15 points as check points (CPs). Using the UAV-derived Digital Terrain Models (DTMs), a dataset comprising 18,492 points was generated for both ellipsoidal (h) and orthometric (H) heights. The differences between these heights, referred to as geoid heights (N), were calculated as N = h - H for all 18,492 points. These geoid heights were subsequently employed to generate a geoid model, including contour maps and 3D maps, of the study area. To assess the accuracy of the UAV-derived geoid heights, a root mean square error (RMSE) analysis was performed by comparing them with the existing geoid heights and was found to be 0.113 m. The scientific novelty and practical significance are in the development of a local geoid model of the study area with centimetre-level precision. Thus, the output of this study can be used for a wide range of applications, including land management, construction, and environmental impact assessments in the study area.

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“…The accuracy of UAVs for land surveying and mapping has been demonstrated all around the world. In Taiwan, for instance, [34] examined high-accuracy topographic mapping using UAV-based images and determined the integration capability of topographic maps via the image of UAV and GCPs. According to [34], UAV-based surveying may eventually be an effective replacement for GPS and total stations.…”

Section: Introductionmentioning

confidence: 99%

“…In Taiwan, for instance, [34] examined high-accuracy topographic mapping using UAV-based images and determined the integration capability of topographic maps via the image of UAV and GCPs. According to [34], UAV-based surveying may eventually be an effective replacement for GPS and total stations. Working on the application of UAV in Ghana for topographical mapping of inaccessible land, [35] concluded that, for mapping inaccessible locations, the combination of RTK technology with UAV and GIS is a viable and adequately accurate option and also recommends it for the creation of precise geometry and cross-sectional drawings for the design of Tailings Storage Facility (TSF).…”

Section: Introductionmentioning

confidence: 99%

Use of unmanned aerial vehicle (UAV) for mapping, and accuracy assessment of the orthophoto with and without using GCPs: A case study in Nepal

SİLWAL>

TAMANG>

Adhikari

2022

Mersin Photogrammetry Journal

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The conventional methods of aerial photogrammetry using helicopters or aeroplanes are costly and challenging for small areas. For a developing country like Nepal, where Geospatial data is in high demand, a new competitive approach is essential for rapid spatial data acquisition at a low cost and time. This article demonstrates how this can be achieved using one of the evolving remote sensing technology, Unmanned Aerial Vehicles (UAVs). The application of UAVs is rapidly increasing in Nepal due to its capability of acquiring images remotely and the potential to provide data with a very high spatial and temporal resolution even in inaccessible terrain at a relatively low cost. Here, the performance of UAV for topographical surveying and mapping has been investigated, along with the comparison between orthophoto obtained using GCPs, and without using GCPs. For this study, a DJI Phantom 3 Advanced quadcopter collected about 700 images at a flying height of 50 m above the settlement area. An orthophoto of 3.78 cm GSD covering 40.83 hectares of area was produced. With appropriate ground control points, an absolute positional accuracy of 0.035 m RMSE was achieved, whereas the output obtained without using GCPs was satisfactory. This study also highlights the use of a High-Performance Computing (HPC) system and open-source platform for rapid image processing.

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Study on High Accuracy Topographic Mapping via UAV-based Images

Cited by 10 publications

References 3 publications

Perceived Usefulness of Airborne LiDAR Technology in Road Design and Management: A Review

Perceived Usefulness of Airborne LiDAR Technology in Road Design and Management: A Review

Modelling local geoid undulations using unmanned aerial vehicles (UAVS): a case study of the Federal University of Technology, Akure, Nigeria

Use of unmanned aerial vehicle (UAV) for mapping, and accuracy assessment of the orthophoto with and without using GCPs: A case study in Nepal

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