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http://dx.doi.org/10.7780/kjrs.2011.27.4.411

DEM Generation of Tidal Flat in Suncheon Bay Using Digital Aerial Images  

Ahn, Ki-Weon (Department of Civil Engineering, Gyeongsang National University)
Lee, Hyo-Seong (Department of Civil Engineering, Sunchon National University)
Kim, Duk-Jin (School of Earth and Environmental Sciences, Seoul National University)
Publication Information
Korean Journal of Remote Sensing / v.27, no.4, 2011 , pp. 411-420 More about this Journal
Abstract
In this study, a digital elevation model (DEM) in tidal flat of Suncheon Bay, one of the most ecological preserved area in the world, was generated from digital aerial stereo-images. The focal lengths for the aerial stereo-images were adjusted using ground control points (GCPs) in order to improve the accuracy of camera parameters. We proposed matching sizes suitable for generating DEM in tidal flat and a method for eliminating excessive position errors using intersection-distance($P_R$) threshold value. The accuracies of the DEM generated from the proposed method as well as the commercial S/W were compared with the elevation profiles measured by Total Station in the filed. As the results, the DEM generated by the proposed method showed better result (maximum deviation is a -21 centimeters) with detailed topography than DEM by the commercial S/W in the region. These results suggest that the DEM of tidal flat, which hardly obtained with the traditional methods, can be generated from digital aerial images by applying the proposed method in this study. We believe that the generated DEM in tidal flat can be an essential data for monitoring the sediment erosion and deposit of the tidal flat.
Keywords
Aerial Stereo-images; DEM; Suncheon Bay Tidal Flat; Matching; Intersection-distance;
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Times Cited By KSCI : 3  (Citation Analysis)
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