Digital Terrain Model (DTM, 2023)

A Digital Terrain Model (DTM) is a 'bare earth' elevation model, unmodified from its original data source (such as lidar, ifsar, or an autocorrelated photogrammetric surface) which is free of vegetation, buildings, and other 'non ground' objects. The DTM is derived from LiDAR point clouds (QL1) and has a 1 ft resolution. For more information, contact: GIS Manager Information Technology & Innovation (ITI) Montgomery County Planning Department, MNCPPC T: 301-650-5634数字地形模型（Digital Terrain Model，DTM）是一类"裸土"地表高程模型，未对其原始数据源（如激光雷达（LiDAR）、干涉合成孔径雷达（ifsar）或自相关摄影测量表面）进行任何修改，且不含植被、建筑物及其他"非地面"物体。该数字地形模型源自激光雷达点云（QL1），分辨率为1英尺。如需获取更多信息，请联系：蒙哥马利县规划署信息技术与创新局（ITI）地理信息系统专员，MNCPPC，电话：301-650-5634