Height data Skaun 2014

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（Elevation data）可对地形与地表进行精细化描述。此类数据可通过机载激光扫描生成点云（point cloud），或基于航空影像匹配构建点云。不同应用场景下，此类点云的点密度（单位：点/平方米）存在差异。基于该类点云，可生成适配地形的格网格式数字地形模型（DTM，Digital Terrain Model）以及适配地表的格网格式数字地表模型（DOM，Digital Surface Model）。