Digital Terrain Model (LiDAR 2019)

The level digital terrain model (LiDAR 2019) is the mapping of the Earth's surface without buildings and vegetation.<br> The data are based on airborne laser measurements with an average point density of 16 points per m2 and a height accuracy of 10 cm (1 sigma=68%). The aerial flight took place in the spring of 2019.2019年激光雷达（Light Detection and Ranging，LiDAR）获取的水准型数字地形模型，为剔除地表建筑物与植被后的地球表面三维测绘成果。 该数据基于机载激光测量技术采集，平均点密度为每平方米16个点，高程精度达10厘米（1σ置信度为68%）。本次航空飞行作业于2019年春季开展。