摘要
利用3维激光扫描仪对变形区域进行变形监测时,同期观测数据需要拼接到同一坐标系下,同时多期观测数据需要在同一外部坐标系下。在分析现有坐标系转换方法和3维激光扫描数据特点的基础上提出了参数优化法。利用参数优化法对三个以上公共点计算,求取转换参数,从而将观测数据转换到外部坐标系下。实验结果表明,该转换方法获取的数据精度有明显的提高,因此具有较高的实际应用价值。
The same period data need to be transformed into the same coordinate system when monitoring the deformation zone using three-dimensional laser scanner.Meanwhile the different period data need to be transformed into the same external coordinate system.The parameter optimization method is presented on the basis of the analysis of existing coordinate system transformation methods and the features of the three-dimensional laser scanning data.Parameter optimization method is adopted to calculate the transformation parameters of the three or more common points,and then the observation data are transformed into the external coordinate system.Experimental results show that the accuracy of this conversion method has been significantly improved.Therefore,this method possesses a good value of practice.
出处
《测绘与空间地理信息》
2012年第12期58-61,共4页
Geomatics & Spatial Information Technology
基金
"863"计划项目多源遥感数据矿区环境与灾害信息精准监测技术(2009AA12 Z 147)
第三批龙岩学院校立服务海西建设项目"基于点云数据的模型重建及变形分析"(龙岩学院科研(2001)5号)资助
关键词
3维激光扫描仪
激光扫描数据特点
坐标转换
参数优化法
three-dimensional laser scanner
the features of the laser scanning data
coordinate transformation
parameter optimization method
