摘要
传统的地形测绘需要人工进行野外采点,存在时间长、成本高、环境危险等问题,且获得的数据不够直观,尤其在地形复杂区域,由于作业条件艰苦、部分地区无法到达,更是难以保证工程按期完成,而利用机载LiDAR技术能够方便地获取测区地表密集采样点的空间坐标和高程信息,为大面积、高效率、高精度获取DEM数据开辟了一条新的途径。本文利用机载LiDAR技术获取高密度的机载激光点云数据,并使用Terra Solid软件设计了点云分类方法和流程,完成高精度DEM的构建和精度分析,验证了利用机载LiDAR数据制作地形复杂区的高精度DEM的可行性。
Traditional topographic mapping requires manual field sampling points,which has some problems such as long time,high cost and environmental danger,and the data obtained is not intuitive enough.Especially in the terrain complex areas,due to difficult working conditions and inaccessible parts of the area,it is difficult to ensure the completion of the project on schedule.The airborne LiDAR technology can easily obtain the spatial coordinates and elevation information of the dense sampling points in the survey area,which opens up a new way to obtain DEM data with large area,high efficiency and high accuracy.In this paper,airborne LiDAR technology is used to obtain high density airborne laser point cloud data,and TerraSolid software is used to design the classification method and process of point cloud,complete the construction of high-accuracy DEM and accuracy analysis and verify the feasibility of using airborne LiDAR data to make high-accuracy DEM in terrain complex areas.
作者
刘声
LIU Sheng(Guangdong Provincial Nonferrous Geological Surveying and Mapping Institute,Guangzhou 510080,China)
出处
《测绘与空间地理信息》
2024年第8期162-164,共3页
Geomatics & Spatial Information Technology
