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http://dx.doi.org/10.7848/ksgpc.2021.39.4.235

Water Depth and Riverbed Surveying Using Airborne Bathymetric LiDAR System - A Case Study at the Gokgyo River  

Lee, Jae Bin (Dept. of Civil Engineering, Mokpo National University)
Kim, Hye Jin (Institute of Engineering Research, Seoul National University)
Kim, Jae Hak (Geo-Spatial Information Planing Team, Geostory Inc.)
Wie, Gwang Jae (Geostory Inc.)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.39, no.4, 2021 , pp. 235-243 More about this Journal
Abstract
River surveying is conducted to acquire basic geographic data for river master plans and various river maintenance, and it is also used to predict changes after river maintenance construction. ABL (Airborne Bathymetric LiDAR) system is a cutting-edge surveying technology that can simultaneously observe the water surface and river bed using a green laser, and has many advantages in river surveying. In order to use the ABL data for river surveying, it is prerequisite step to segment and extract the water surface and river bed points from the original point cloud data. In this study, point cloud segmentation was performed by applying the ground filtering technique, ATIN (Adaptive Triangular Irregular Network) to the ABL data and then, the water surface and riverbed point clouds were extracted sequentially. In the Gokgyocheon river area, Chungcheongnam-do, the experiment was conducted with the dataset obtained using the Leica Chiroptera 4X sensor. As a result of the study, the overall classification accuracy for the water surface and riverbed was 88.8%, and the Kappa coefficient was 0.825, confirming that the ABL data can be effectively used for river surveying.
Keywords
River Surveying; Airborne Bathymetric LiDAR; Riverbed Extraction; Ground Filtering; ATIN;
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