Height data Selbu 5pkt 2007

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).

高程数据能够精细化描述地形与地表。此类数据可通过机载激光扫描生成点云，或通过航空影像匹配获取点云。根据不同应用场景的需求，该类点云的点密度（点/平方米）存在差异。基于上述点云，可生成栅格格式的地形（DTM, Digital Terrain Model）与地表（DOM, Digital Orthophoto Map）高程模型。