Height data NDH Kvænangen 5pkt 2020

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).

高程数据可精准刻画地形与地表的细节特征。此类数据可通过机载激光扫描（airborne laser scanning）生成点云（Point Clouds），或基于航空影像（aerial images）匹配得到点云。针对不同应用需求，点云的点密度（单位：点/平方米）存在差异。基于上述点云数据，可生成栅格格式的数字地形模型（Digital Terrain Model, DTM）与数字地表模型（Digital Surface Model, DOM）。