Elevation data Sulitjelma 2010

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。该类数据可通过机载激光扫描或航空影像匹配的方式生成点云数据集。针对不同应用需求，此类点云的点密度（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（DTM，Digital Terrain Model）与地表高程模型（DOM，Digital Surface Model）。