Elevation data NDH Larvik 5pkt 2017

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形态特征。此类数据可通过机载激光扫描或航空影像匹配处理为点云（point clouds）。针对不同应用场景，此类点云的密度（单位：点/平方米）存在差异。基于该类点云，可生成格网格式的地形高程模型（DTM）与地表高程模型（DOM）。