一种航带间点云高程差超限的校正方法  

A Correction Method for the Elevation Difference Over Limit of Point Cloud Data in Adjacent Strips

作　　者：郭如宝 GUO Rubao(Inner Mongolia Institute of Aeronautical Remote Sensing and Surveying,Hohhot Inner Mongolia 010010,China)

机构地区：[1]内蒙古自治区航空遥感测绘院,内蒙古呼和浩特010010

出　　处：《北京测绘》2021年第1期16-19,共4页Beijing Surveying and Mapping

基　　金：2017年国家基础航空航天遥感影像获取项目(四期)(1741STC41739)。

摘　　要：机载LiDAR技术是点云数据获取的主要技术手段,在飞行作业中受气象条件、飞机姿态、IMU累计误差、基站不均匀等客观因素的影响,会出现航带间点云高程差超限的问题。本文提出一种对航带间点云高程差超限的校正方法,对相邻航带进行整体平差,能有效消除或减小相邻航带重叠区域的高程差异。选择通辽摄区为试验区,对试验区点云数据高程差超限部分进行校正处理,并通过大量外业检查点对点云精度进行检测,最终验证了这一方法的可行性,可在其他项目中推广应用。Airborne LiDAR technology is a main technical means to obtain point cloud data.Due to the influence of meteorological conditions,aircraft attitude,accumulated error of IMU,uneven base station and other objective factors in flight operation,the height difference of point cloud between flight bands always exceeds the limit.In this paper,a correction method of point cloud elevation difference between navigation belts is proposed.The overall adjustment of adjacent navigation belts can effectively eliminate at or reduce the elevation difference in the overlapping area of adjacent navigation belts.Tongliao area was selected as the experimental area.The over limit elevation difference of point cloud data in the test area was corrected,and the accuracy of point cloud was evaluated through a large number of field inspection points.The feasibility of this method is finally verified applied in other projects.

关 键 词：机载激光雷达 相邻航带 高程差 校正方法 

分 类 号：P231[天文地球—摄影测量与遥感]