Height data Viken laser – Østfold 5pkt part3 2022

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).高程数据可精细化刻画地形与地表特征。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得到点云。针对不同应用需求，点云的密度（单位：点/平方米）存在差异。基于上述点云，可生成网格格式的地形高程模型（Digital Terrain Model，DTM）与地表高程模型（Digital Surface Model，DOM）。