Relief digital surface model (LiDAR 2019)

The level “Relief Digital Surface Model (LiDAR 2019)” is the shaded image of the earth’s surface with buildings and vegetation. The data are based on airborne laser measurements with an average point density of 16 points per m² and an altitude accuracy of 10 cm (1 Sigma=68 %). The flight took place in spring 2019.本次涉及的数据图层——地形数字地表模型（Relief Digital Surface Model, LiDAR 2019），是涵盖建筑物与植被信息的地球表面光影晕渲图像。该数据集依托机载激光测量技术获取，平均点密度为每平方米16个点，高程精度达10厘米（1倍标准差对应68%置信度）。其航飞数据采集工作于2019年春季开展。