Elevation data Image Midtre Gauldal west 2021

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）可对地形与地表实现精细化刻画。此类数据可通过机载激光扫描（airborne laser scanning）或航空影像（aerial images）匹配的方式生成点云（point clouds）。
点云的密度（单位：点/平方米）因应用场景差异而有所不同。
基于上述点云，可生成适配地形的栅格格式数字地形模型（DTM）与适配地表的栅格格式数字地表模型（DOM）。