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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Comparative Analysis of Digital Elevation Models between AW3D30, SRTM30 and Airborne LiDAR: A Case of Chuncheon, South Korea

  • Acharya, Tri Dev (Dept. of Civil Engineering, Kangwon National University) ;
  • Yang, In Tae (Dept. of Civil Engineering, Kangwon National University) ;
  • Lee, Dong Ha (Dept. of Civil Engineering, Kangwon National University)
  • Received : 2018.01.29
  • Accepted : 2018.02.28
  • Published : 2018.02.28
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Abstract

DEM (Digital Elevation Model) is a useful dataset which represents the earth surface. Beside many applications, production and frequent update of DEM is a costly task. Recently global satellite based DEMs are available which has huge potential for application. To check the accuracy, this study compares two global DEMs: AW3D30 (Advanced Land Observing Satellite World 3D 30m) and SRTM30 (Shuttle Radar Topography Mission Global 30m) with reference resampled LiDAR DEM 30m in a test area around Chuncheon, Korea. The comparison analysis was based on statistics of each DEM, their difference, profiles, slope, basin and stream orders. As a result, it is found that SRTM30 and AW3D30 were much similar but inconsistent in the test area compared to the LiDAR30 DEM. In addition, SRTM30 shows less difference with LiDAR30 compared to the AW3D30 DEM. But, DEMs should be very carefully examined for area which has temporal or season changes. For basin and stream analysis, global DEMs can be used only for regional scale analysis not local large scales.

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References

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