机载LiDAR在大比例尺地形图测绘中的应用分析

Application Analysis of Airborne LiDAR in Large-scale Topographic Mapping

针对传统大比例尺地形图测量方式中存在精度低、效率低、无法全天候等缺点,为开展工程中大比例尺地形图测量工作,采用无人机机载LiDAR测量系统对测区进行了快速扫测,经内业处理数据,最后结合测区已有地形图进行对比分析。实验结果表明:无人机机载LiDAR测量系统在山区、植被覆盖较密的地形测量中具有快速的优势,且测量数据满足大比例尺地形图精度要求,同时也为未来空天地一体化快速测量大比例尺地形图思路提供借鉴。

In view of the shortcomings of traditional large-scale topographic map measurement methods,such as low precision,low efficiency and inability to measure all-weather,in order to carry out large-scale topographic map measurement in the project,UAV airborne LiDAR measurement system is used to quickly scan the survey area,process the data in the office,and finally compare and analyze the existing topographic maps in the survey area.The experimental results show that the UAV airborne LiDAR measurement system has the advantage of fast topographic survey in mountainous areas with dense vegetation coverage,and the measurement data meet the accuracy requirements of large-scale topographic map.At the same time,it also provides reference for the idea of rapid measurement of large-scale topographic map in the future.