Building digital surface model (LiDAR 2018)

The normalized digital surface model is the result of the difference calculation between the DOM (raster data) and DTM (raster data) and includes the buildings from 2018 (LiDAR).归一化数字表面模型（normalized digital surface model）为数字正射影像图（Digital Orthophoto Map，DOM，栅格数据）与数字地形模型（Digital Terrain Model，DTM，栅格数据）的差值计算结果，涵盖2018年激光雷达（Light Detection and Ranging，LiDAR）采集的建筑物信息。