Height data Stjørdal 2015

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。该类数据可通过机载激光扫描获取点云，或由航空影像匹配生成点云。此类点云的点密度（单位：点/平方米）因应用需求不同而存在差异。
基于上述点云，可生成数字地形模型（Digital Terrain Model，DTM）与数字地表模型（Digital Surface Model，DOM）两类格网格式高程模型。