Height data NDH Vanylven-Volda 2pkt 2019

Elevation data provides a detailed description of terrain and surface. The data are established as point clouds from airborne laser scanning or matching from aerial images. The point clouds have varying density (point/m²) for different purposes. From the point clouds, elevation models are generated on grid format of terrain (DTM) and surface (DOM). Elevation data provides a detailed description of terrain and surface. The data are established as point clouds from airborne laser scanning or matching from aerial images. The point clouds have varying density (point/m²) for different purposes. From the point clouds, elevation models are generated on grid format of terrain (DTM) and surface (DOM).

高程数据可对地形与地表进行精细化刻画。该类数据可通过机载激光扫描（airborne laser scanning）获取点云（point clouds），或通过航空影像（aerial images）匹配生成点云。点云的点密度（单位：点/平方米）因应用需求不同而存在差异。基于此类点云，可生成地形网格格式的数字高程模型（DTM，Digital Terrain Model）与地表网格格式的数字高程模型（DOM，Digital Surface Model）。高程数据可对地形与地表进行精细化刻画。该类数据可通过机载激光扫描（airborne laser scanning）获取点云，或通过航空影像（aerial images）匹配生成点云。点云的点密度（单位：点/平方米）因应用需求不同而存在差异。基于此类点云，可生成地形网格格式的数字高程模型（DTM，Digital Terrain Model）与地表网格格式的数字高程模型（DOM，Digital Surface Model）。