Height data Ringerike 2012

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（Elevation data）可对地形与地表进行精细化描述。此类数据可通过机载激光扫描生成点云，或基于航空影像匹配获取点云。不同应用场景下，点云的点密度（点/平方米）存在差异。 基于此类点云，可生成格网格式的地形（DTM）与地表（DOM）高程模型。