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http://dx.doi.org/10.22640/lxsiri.2019.49.2.57

Construction of 3D Spatial Information of Vertical Structure by Combining UAS and Terrestrial LiDAR  

Kang, Joon-Oh (Department of Urban Engineering, Incheon National University)
Lee, Yong-Chang (Department of Urban Engineering, Incheon National University)
Publication Information
Journal of Cadastre & Land InformatiX / v.49, no.2, 2019 , pp. 57-66 More about this Journal
Abstract
Recently, as a part of the production of spatial information by smart cities, three-dimensional reproduction of structures for reverse engineering has been attracting attention. In particular, terrestrial LiDAR is mainly used for 3D reproduction of structures, and 3D reproduction research by UAS has been actively conducted. However, both technologies produce blind spots due to the shooting angle. This study deals with vertical structures. 3D model implemented through SfM-based image analysis technology using UAS and reproducibility and effectiveness of 3D models by terrestrial LiDAR-based laser scanning are examined. In addition, two 3D models are merged and reviewed to complement the blind spot. For this purpose, UAS based image is acquired for artificial rock wall, VCP and check point are set through GNSS equipment and total station, and 3D model of structure is reproduced by using SfM based image analysis technology. In addition, Through 3D LiDAR scanning, the 3D point cloud of the structure was acquired, and the accuracy of reproduction and completeness of the 3D model based on the checkpoint were compared and reviewed with the UAS-based image analysis results. In particular, accuracy and realistic reproducibility were verified through a combination of point cloud constructed from UAS and terrestrial LiDAR. The results show that UAS - based image analysis is superior in accuracy and 3D model completeness and It is confirmed that accuracy improves with the combination of two methods. As a result of this study, it is expected that UAS and terrestrial LiDAR laser scanning combination can complement and reproduce precise three-dimensional model of vertical structure, so it can be effectively used for spatial information construction, safety diagnosis and maintenance management.
Keywords
UAS; SfM; Vertical Structures; Terrestrial LiDAR; Point Clouds; Combination Analysis;
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