三维激光扫描仪技术在地形测量中的应用

1.长安大学 地质工程与测绘学院,陕西 西安 710064; 2.重庆交通大学 土木建筑学院,重庆 400074

激光扫描; 坐标转换; 地形图; 精度分析

Application of 3D laser scanning technology in topographical survey
ZHANG Jing1,ZHANG Ai-neng1,LIU Guo-dong2

(1.School of Geology Engineering and Geomatics,Chang'an University,Xi'an 710064,China; 2.School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China)

laser scanning; coordinate transformation; topographic maps; precision analysis

备注

利用三维激光测量技术进行山区复杂地形测量的流程与方法,实验通过使用徕卡ScanStation2型号的三维激光扫描仪对西安市白鹿原北坡进行了扫描,对扫描后的各测站数据进行基于标靶的拼接,对拼接后的点云数据进行预处理。将基于扫描仪坐标系统的点云数据转换到基于施工独立坐标系统后,使用Geomagic和cass软件绘制地形图等高线。在测区内布设一定数量检核点,扫描时在检核点上安置蓝白标靶,采用全站仪测量检核点的独立坐标与扫描仪测量的坐标进行对比来验证扫描数据的精度,得到平面坐标差值绝对值最大值为0.024 m,而高程的差值绝对值最大值为0.029 m,实验结果表明,三维激光扫描仪满足地形测量精度要求。

With the rapid development of 3D laser scanning technique,3D laser scanners have been extensively applied in many fields.The paper mainly described the application of 3D laser scanner in topographical survey.By using the leica ScanStation2 3D laser scanner to scan a terrain,after the scan data coordinate system conversion,using Geomagic,and cass software mapping topographic maps contour.The precision was confirmed by the comparison of the detail points' coordinates measured by Total station and scanner coordinates.The result of experiment showed that the precision of 3D laser scanner could satisfy the requirements of topographical survey.In conclusion,the paper summarized the advantage of the usage of 3D laser scanning technology in topographical survey.