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首页> 外文会议>Asian conference on remote sensingACRS >RESEARCH ON MAPPING LEVEE LINES USING LIDAR DATA IN THE NAKDONG RIVER BASINS, SOUTH KOREA
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RESEARCH ON MAPPING LEVEE LINES USING LIDAR DATA IN THE NAKDONG RIVER BASINS, SOUTH KOREA

机译：韩国南德河流域LIDAR数据映射堤防线路研究

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Mapping levee lines is important for describing the levee shapes and identifying erosions occurring on the levee surfaces. This research proposes a procedure for mapping levee lines using the airborne topographic LiDAR data. The procedure for mapping the levee lines using the LiDAR data is operated as follows: First, the DSM (Digital Surface Models) is generated from the LiDAR point clouds by using the linear interpolation and the median filtering. Then, the slope map is generated from the DSM by calculating the maximum rates of elevation difference between each pixel of the DSM and its neighboring pixels. The levee crown plates and the levee slope plates are separately generated from the slope map by the slope difference analysis. The levee slope plates are used to identify the locations of the levees in Nadong River Basins. The levee crown plates are used to extract the levee lines from the LiDAR data. The modified convex hull algorithm is employed to extract the points that are located along the boundary of the generated crown plate. Finally, the smoothing spline function is applied to construct the levee lines using the extracted boundary points.
机译：映射Levee线路对于描述堤防形状和识别在堤坝表面上发生的侵蚀非常重要。该研究提出了一种使用空中地形激光雷达数据映射堤防线的过程。使用LIDAR数据映射Levee线的步骤如下操作：首先，通过使用线性插值和中值滤波，从激光雷云生成DSM（数字表面模型）。然后，通过计算DSM的每个像素与其相邻像素之间的高度差的最大速率，从DSM生成斜率图。通过斜率差异分析，堤坝冠板和堤坝斜坡板分别由斜率图分开产生。 Levee斜坡板用于识别Nadong River盆地的堤坝的位置。堤坝冠板用于从LIDAR数据中提取堤坝线。改进的凸壳算法用于提取沿着所产生的冠板的边界定位的点。最后，应用平滑样条函数以使用提取的边界点构造堤坝线。

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