Application of Airborne LiDAR Technology in Large-scale Topographic Mapping of Mines
For conventional unmanned aerial vehicles mounted with visible light cameras for aerial surveying,the process of generating ground three-dimensional coordinate information through aerial triangulation is limited by the high vegetation coverage density and large terrain undulations on the ground.Visible light aerial surveying cameras often can only obtain elevation data of vegetation surfaces,that is,DSM(Digital Surface Model)data,and cannot obtain ground elevation data,that is,DEM(Digital Elevation Model)data,which cannot meet the needs of generating large-scale topographic maps.By using drones to mount LiDAR equipment,LiDAR can penetrate surface vegetation and directly measure the real surface.After classifying point clouds,DEM can be produced for large-scale topographic map generation,which can solve the technical problems of slow measurement speed and insufficient accuracy of visible light aerial surveying technology in mining areas with large drop and dense vegetation.
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