机载LiDAR航带法区域网平差方法研究  

Block adjustment method airborne LiDAR

作　　者：王丽英[1,2] 宋伟东[1] 刘正军[2] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国测绘科学研究院,北京100830

出　　处：《测绘科学》2011年第3期56-58,共3页Science of Surveying and Mapping

基　　金：国家自然科学基金面上项目(40771159);辽宁省科学技术厅社会发展攻关计划(2007308003)

摘　　要：机载LiDAR数据即使经过良好的检校仍可能呈现残余系统误差。由于残存系统误差和偶然误差的影响,测区各个航带间精度不一致且均存在变形,本文借鉴摄影测量区域网平差的思想,提出一种机载L iDAR区域网平差方法,以单航带作为基础,把几条航带或一个测区作为一个解算的整体,同时求得整个测区内全部激光点改正坐标,对航带网进行非线性变形改正。实验表明,使用本文提出的平差方法获取最终点云的精度优于经典航带平差方法获取的结果。Airborne LiDAR data may still show residual systematic errors even after a good calibration.Due to the residual systematic errors and accidental errors,accuracy of each flight test area is inconsistent and deformation exists,this paper presented a method of airborne LiDAR block adjustment,referring to the idea of photogrammetric block adjustment.It put several strips or a test area as a whole solution and obtained all the laser point corrected coordinates throughout the test area meanwhile.Experimental results showed that the proposed adjustment method was superior to the classical method of strip adjustment.

关 键 词：LIDAR 区域网平差 非线性变形 

分 类 号：P231[天文地球—摄影测量与遥感]