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http://dx.doi.org/10.7780/kjrs.2021.37.3.16

Accuracy Improvement of DEM Using Ground Coordinates Package  

Lee, Hyoseong (Department of Civil Engineering, Sunchon National University)
Oh, Jaehong (Department of Civil Engineering, Korea Maritime and Ocean University)
Publication Information
Korean Journal of Remote Sensing / v.37, no.3, 2021 , pp. 567-575 More about this Journal
Abstract
In order to correct the provided RPC and DEM generated from the high-resolution satellite images, the acquisition of the ground control point (GCP) must be preceded. This task is a very complicate that requires field surveys, GPS surveying, and image coordinate reading corresponding to GCPs. In addition, since it is difficult to set up and measure a GCP in areas where access is difficult or impossible (tidal flats, polar regions, volcanic regions, etc.), an alternative method is needed. In this paper, we propose a 3D surface matching technique using only the established ground coordinate package, avoiding the ground-image-location survey of the GCP to correct the DEM produced from WorldView-2 satellite images and the provided RPCs. The location data of the public control points were obtained from the National Geographic Information Institute website, and the DEM was corrected by performing 3D surface matching with this package. The accuracy of 3-axis translation and rotation obtained by the matching was evaluated using pre-measured GPS checkpoints. As a result, it was possible to obtain results within 2 m in the plane location and 1 m in height.
Keywords
RPC; DEM; GCPs; public control points; 3D surface matching;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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