Height data NDH Årdal 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). 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) 可详尽刻画地形与地表的形态特征。该数据通过机载激光扫描 (airborne laser scanning) 生成点云 (point clouds)，或基于航空影像 (aerial images) 匹配获取点云。点云的点密度（单位：点/平方米）因不同应用需求而存在差异。基于上述点云，可生成适配地形（数字地形模型，DTM）与地表（数字地表模型，DOM）的格网格式高程模型。高程数据 (Elevation data) 可详尽刻画地形与地表的形态特征。 该数据通过机载激光扫描 (airborne laser scanning) 生成点云 (point clouds)，或基于航空影像 (aerial images) 匹配获取点云。 点云的点密度（单位：点/平方米）因不同应用需求而存在差异。 基于上述点云，可生成适配地形（数字地形模型，DTM）与地表（数字地表模型，DOM）的格网格式高程模型。