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）是数字正射影像图（DOM，栅格数据）与数字地形模型（DTM，栅格数据）的差值运算结果，包含2018年激光雷达（LiDAR）采集的建筑物数据。