Height data NDH Berg 2pkt 2017

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开展精细化描述。此类数据可通过机载激光扫描生成点云，亦可基于航空影像经匹配算法构建点云。针对不同应用需求，点云密度（单位：点/平方米）存在差异。基于上述点云，可生成格网格式的地形高程模型（Digital Terrain Model，DTM）与地表高程模型（Digital Surface Model，DOM）。