Elevation data Hordaland 2008

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形态。该类数据通过机载激光扫描或航空影像匹配生成点云（point cloud）。此类点云依据不同应用场景，具有各异的点密度，单位为点/平方米。基于上述点云，可生成格网格式的地形高程模型（DTM）与地表高程模型（DOM）。