基于船载三维激光扫描系统的航道沿岸大比例尺测图

内河航道沿岸地形复杂多变,传统的地形测量方式存在工作量大、效率低等弊端。提出可采用船载三维激光扫描系统来获取沿岸大比例尺地形数据,以某内河航道为例,总结数字成图的关键步骤,并结合RTK采集的验证点,对比分析试验精度。结果表明:船载三维激光扫描系统获取的点云的平面和高程精度均优于10 cm,满足1∶500大比例尺测图的精度要求。

Large-scale mapping along waterway coastal based on ship-borne 3D laser scanning system

The topography of inland waterways is complicated and changeable,and the traditional way of topographic survey is heavy workload and inefficiency.We apply the ship-borne 3D laser scanning system to get the large-scale terrain data.Taking an inland waterway as an example,we summarize the key steps in the digital mapping,and analyze the accuracy of the experiment using the verification point of collected by RTK.The results show that the precision of point cloud that is collected by ship-borne 3D laser scanning system is superior to 10 cm in plane and height,which satisfy the demands of large-scale mapping accuracy.