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The Feature Information Rapid Extraction of Barrier Lake and Downstream Channel Based on Point Cloud Data

机译：基于点云数据的屏障湖和下游信道的特征信息快速提取

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摘要

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.
机译：本文的目标是使用LIDAR点云数据快速提取阻挡湖特征信息。这项研究包括两个键。一种是基于点云数据和高分辨率图像数据提取障碍湖和下游信道的边界信息。另一个是用点云数据生成DEM，然后从DEM中提取斜率，方面，配置文件，脊线和谷线。作为唐家山障碍湖作为汶川地震引起的研究区，本文的研究内容用该地区的LiDAR点云数据提取唐家山屏障湖和下游通道特征信息。特征信息包含水边界信息和地形特征信息。唐家山屏障湖特色信息的提取结果更为准确。同时，提取时间不太长时间才能满足快速访问特征信息的需求。因此，本研究提供了一组关于精确提取障碍湖信息的完整和可行的方法。

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