Abstract
The goal of this paper is extracting the Barrier Lake characteristics information quickly using LiDAR point cloud data. This research includes two keys. One is extracting the boundary information of Barrier Lake and downstream channel based on the point cloud data and high-resolution image data. The other one is generating DEM with point cloud data, and then extracting slope, aspect, profile, ridge lines and valley lines from the DEM. As the Tangjiashan barrier lake as the study area induced by Wenchuan earthquake in 2008, the researching content of this paper is extracting Tangjiashan Barrier Lake and downstream channel characteristics information using the LiDAR point cloud data in this area. The characteristics information contains the water boundary information and terrain characteristics information. The extraction result of Tangjiashan barrier lake characteristics information is more accurate. Meanwhile, the extraction time is not too long to meet the needs of accessing characteristics information quickly. Therefore, this study provides a set of complete and workable methods about extracting barrier lake information accurately and quickly.
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