山猫(Lynx)车载激光移动测量系统精度分析

利用山猫(Lynx)车载激光移动测量系统采集了5条实验路段的激光点云数据,通过数据联合解算,采用不同间距的检校点纠正方案,得出了有益的结论:车载激光移动测量系统沿带状线路进行测量时,对沿线GPS基站的要求较高,数据采集位置距基站的平均距离不应大于系统的标称值,超过标称基站距离的激光点云高程精度将大幅下降。要提高激光点云的位置精度,可布设检校点对激光点云进行纠正,应根据不同的成图精度选择不同间距的检校点布设方案。

Accuracy Analysis of Lynx Mobile Laser Scanning Measurement System

In this paper,we collect LiDAR (Light Detection and Ranging) datasets from five test roads using Lynx mobile laser scanning measurement system. By joint solution and correction between check points with different interval, we get promising results for peers to reference. Firstly,the measurement results given by mobile laser scanning measure-ment system strongly depend on the GPS (Global Position System) base stations all along. Secondly,the average distance between the base station and the data collection points should not be more than the system calibration values,or the meas-ured height precision will decrease to a large extent. Finally,the position accuracies of LiDAR point clouds can be in-creased by setting check points to correct the point clouds. In addition,different check points setting approaches should be chosen according to different mapping precision.