摘要
低空机载LiDAR因其系统的复杂性,点云定位精度受很多系统误差影响。为了研究改善点云定位精度的方法,文中根据LiDAR定位误差模型综合分析航高、扫描角、IMU姿态角、姿态角误差等对点云定位误差的影响,并根据误差影响规律分析得出不同地形测图比例尺对飞行参数的要求。通过长江中下游实测地区作业验证,建议设置飞行参数得到的点云定位精度符合精度要求。
Positioning accuracy of low-altitude airborne LiDAR point clouds is affected by many complex systemic errors. In order to develop a method to improve positioning accuracy,this paper analyzes the effects of flying height,scan angle,IMU attitude angle,attitude errors and other errors to the positioning errors based on LiDAR positioning model. Then,according to the law of positioning errors,suitable flight parameters can be obtained to meet the requirements of different scale topographic mapping. The experimental result in the Yangtze River region shows that the flight parameters set by the proposed method can improve the positioning error of point cloud.
作者
杜婷
李浩
杨彪
苏博
刘亚南
DU Ting, LI Hao, YANG Biao, SU Bo, LIU Yanan(School of Earth Science and Engineering, Hohai University, Nanjing 211100,Chin)
出处
《测绘工程》
CSCD
2018年第3期25-29,34,共6页
Engineering of Surveying and Mapping
基金
水利部黄土高原水土流失过程与控制重点实验室开放课题(2015001)
关键词
机载LIDAR
定位误差
低空
点云
airborne LiDAR
positioning accuracy
low altitude
point cloud
