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首页> 外文会议>Asian conference on remote sensing;ACRS >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：韩国那东江流域利用激光雷达数据绘制水平线的研究

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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：绘制堤防线对于描述堤防形状和识别在堤防表面上发生的侵蚀非常重要。这项研究提出了一种使用机载地形LiDAR数据绘制堤防线的程序。使用LiDAR数据绘制堤防线的过程如下：首先，通过使用线性插值和中值滤波从LiDAR点云生成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最大仰角差异率，从DSM生成斜率图。通过坡度差分析，根据坡度图分别生成堤防冠板和堤防斜板。堤防坡板用于识别纳东河流域的堤防位置。堤顶板用于从LiDAR数据中提取堤防线。改进的凸包算法用于提取沿生成的冠板边界定位的点。最后，使用平滑样条函数使用提取的边界点构造堤防线。

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