Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
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Accuracy Evaluation of Earthwork Volume Calculation According to Terrain Model Generation Method

지형모델 구축 방법에 따른 토공물량 산정의 정확도 평가

  • Park, Joon Kyu (Department of Civil Engineering, Seoil University) ;
  • Jung, Kap Yong (Department of Construction Engineering Education, Chungnam National University)
  • Received : 2021.01.25
  • Accepted : 2021.02.23
  • Published : 2021.02.28
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Abstract

Calculation of quantity at construction sites is a factor that has a great influence on construction costs, and it is important to calculate accurate values. In this study, topographic model was created by using drone photogrammetry and drone LiDAR to estimate earthwork volume. ortho image and DSM (Digital Surface Model) were constructed for the study area by drone photogrammetry, and DEM (Digital Elevation Model) of the target area was established using drone LiDAR. And through accuracy evaluation, accuracy of each method are 0.034m, 0.35m in horizontal direction, 0.054m, 0.25m in vertical direction. Through the research, the usability of drone photogrammetry and drone LiDAR for constructing geospatial information was presented. As a result of calculating the volume of the study site, the UAV photogrammetry showed a difference of 1528.1㎥ from the GNSS (Global Navigation Satellite System) survey performance, and the 3D Laser Scanner showed difference of 160.28㎥. The difference in the volume of earthwork is due to the difference in the topographic model, and the efficiency of volume calculation by drone LiDAR could be suggested. In the future, if additional research is conducted using GNSS surveying and drone LiDAR to establish topographic model in the forest area and evaluate its usability, the efficiency of terrain model construction using drone LiDAR can be suggested.

건설현장에서 토공물량 산정은 설계에서 시공에 이르기까지 공사비에 큰 영향을 주는 요소로 정확한 값을 산출하는 것이 중요하다. 본 연구에서는 토공물량 산정을 위해 드론 사진측량과 드론 LiDAR를 이용한 방법으로 지형모델을 생성하였다. 드론 사진측량 방법으로 연구대상지의 DSM (Digital Surface Model) 및 정사영상을 구축하였으며, 드론 LiDAR를 이용해 연구대상지의 DEM (Digital Elevation Model)을 구축하였다. 각각의 방법으로 생성된 지형모델에 대한 정확도 평가를 수행하여 각각의 방법이 수평방향 0.034m, 0.035m, 수직방향 0.054m, 0.025m의 차이를 나타내어 지형모델 구축을 위한 드론 사진측량과 드론 LiDAR의 활용성을 제시하였다. 연구대상지의 토공물량 산정 결과, 드론 사진측량은 GNSS 측량 성과와 1528.1㎥의 차이를 나타내었으며, 드론 LiDAR는 160.28㎥의 차이를 나타내었다. 토공물량의 차이는 식생 및 가건물로 인한 지형모델의 차이로 판단되며, 연구를 통해 드론 LiDAR에 의한 물량산정의 효율성을 제시할 수 있었다. 향후 추가적인 연구를 통해 GNSS (Global Navigation Satellite System) 측량과 드론 LiDAR를 활용한 방법으로 산림지역에서의 지형모델 구축 및 활용성에 대한 평가가 이루어진다면 드론 LiDAR를 이용한 지형모델 구축의 활용성을 제시할 수 있을 것이다.

Keywords

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