Elevation data NDH Sunnmøre Nord 2pkt 2016

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（airborne laser scanning）生成点云，或通过航空影像匹配获取点云。针对不同应用需求，点云的密度（点/平方米）存在差异。 基于上述点云，可生成地形（数字地形模型，DTM）与地表（数字地表模型，DOM）的栅格格式高程模型。