城市地形三维激光测绘雷达选点误差控制方法  

Control method for point selection error of urban terrain by 3D laser surveying and mapping radar

作　　者：张苍 ZHANG Cang(Zhejiang General Team of China Building Materials Industry Geological Exploration Center,Hangzhou,Zhejiang 310000,China)

机构地区：[1]中国建筑材料工业地质勘查中心浙江总队,浙江杭州310000

出　　处：《北京测绘》2025年第3期312-315,共4页Beijing Surveying and Mapping

摘　　要：为提升城市地形测绘精度,本文提出三维激光测绘雷达选点误差控制法。该方法通过误差分析,选择系统误差校验模型校正测绘选点误差,并据此计算目标实际位置坐标,进而去除高程点云中的粗差点,精确提取相对高程,实现高程控制点精细化提取,有效减少测绘选点误差。测试结果表明,坐标误差控制在(0.5,0.5,1.0)m内,高程误差在0.2~1.2 m,满足城市测绘精度要求,清晰展现城市地势变化。To improve the accuracy of urban terrain surveying and mapping,a control method for point selection error by three-dimensional(3D)laser surveying and mapping radar was proposed.This method used error analysis to select a system error verification model,so as to correct point selection errors by surveying and mapping,and it thus calculated the actual position coordinates of the target.Furthermore,the gross error points in the elevation point cloud were removed,and the relative elevation was accurately extracted,achieving precise extraction of elevation control points and effectively reducing point selection errors by surveying and mapping.The test result shows that the coordinate error is controlled within(0.5,0.5,1.0)m,and the elevation error is between 0.2-1.2 m,which meets the accuracy requirements of urban surveying and mapping and clearly displays the changes in urban terrain.

关 键 词：城市地形 三维激光测绘 雷达选点 误差控制 粗差点 高程控制点 

分 类 号：P258[天文地球—测绘科学与技术]