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Characteristic and Accuracy Analysis of Digital Elevation Data for 3D Spatial Modeling

3차원 공간 모델링을 위한 수치고도자료의 특징 및 정확도 분석

  • Lee, Keun-Wang (Department of the Multimedia Science, Chungwoon University) ;
  • Park, Joon-Kyu (Department of Civil Engineering, Seoil University)
  • 이근왕 (청운대학교 멀티미디어학과) ;
  • 박준규 (서일대학교 토목공학과)
  • Received : 2018.08.24
  • Accepted : 2018.11.02
  • Published : 2018.11.30

Abstract

Informatization and visualization technology for real space is a key technology for construction of geospatial information. Three-dimensional (3D) modeling is a method of constructing geospatial information from data measured by various methods. The 3D laser scanner has been mainly used as a method for acquiring digital elevation data. On the other hand, the unmanned aerial vehicle (UAV), which has been attracting attention as a promising technology of the fourth industrial revolution, has been evaluated as a technology for obtaining fast geospatial information, and various studies are being carried out. However, there is a lack of evaluation on the quantitative work efficiency and data accuracy of the data construction technology for 3D geospatial modeling. In this study, various analyses were carried out on the characteristics, work processes, and accuracy of point cloud data acquired by a 3D laser scanner and an unmanned aerial vehicle. The 3D laser scanner and UAV were used to generate digital elevation data of the study area, and the characteristics were analyzed. Through evaluation of the accuracy, it was confirmed that digital elevation data from a 3D laser scanner and UAV show accuracy within a 10 cm maximum, and it is suggested that it can be used for spatial information construction. In the future, collecting 3D elevation data from a 3D laser scanner and UAV is expected to be utilized as an efficient geospatial information-construction method.

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Fig. 1. Study Flow

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Fig. 2. SX10

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Fig. 3. Scanning Data Acquisition and Processing

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Fig. 4. Digital Elevation Data by 3D Laser Scanner

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Fig. 5. Shaded areas of the 3D Laser Scanner

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Fig. 6. Check Points of 3D Laser Scanner Data

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Fig. 7. Phantom4 Pro

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Fig. 8. Data Processing Flow and Data Processing Screen

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Fig. 9. Ortho Image

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Fig. 10. Digital Elevation Data

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Fig. 11. Curvature of Digital Elevation Data by UAV

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Fig. 12. Check Points of UAV

Table 1. Work Process and Time by 3D Laser Scanner

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Table 2. Accuracy evaluation results of 3D Laser Scanner

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Table 3. Work Process and Time by 3D Laser Scanner

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Table 4. Accuracy evaluation results of UAV

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Table 5. Features and Accuracy of Pointcloud Data

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Table 6. Estimated Time of Data Acquisition and Processing by area

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Acknowledgement

Supported by : 청운대학교

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