适用于准动态GPS与三维激光扫描联合定位精度测试的小区域基准网建立

The Establishment of Small Regional Reference Network Suitable for the Precision Testing of Joint Positioning of Quasi-dynamic GPS and 3D Laser Scanning

将三维激光扫描技术与GPS技术融合可解决点云数据实时定位问题,但制约该技术推广应用的是其精度是否满足工程需求。为了检验、评价三维激光扫描仪与差分GPS结合的测量精度,需要建立一个合适范围的基准网,基准网内有足够的已知点与融合GPS数据的三维激光扫描点云整体精度进行比较,分析该方法测量的误差大小与误差性质,从而确定该技术的适用性。本文以Reigl VZ-1000三维激光扫描仪为例,主要研究小区域基准网构建、测量以及数据的平差处理,依据《工程测量规范》、《城市测量规范》等,通过踏勘选点、构网、网形设计、外业测量,建立小区域基准网,并利用PA2002软件进行了高程闭合环和闭合导线网的平差,从而获得了符合要求的基准网。

The integration of 3D laser scanning technology with GPS technology can solve the problem of real-time positioning of point cloud data,but the application of this technology is limited to whether its accuracy meets engineering requirements.To test and evaluation of the combination of 3D laser scanner and GPS differential measurement precision,It needs to build a suitable range of benchmark network datum net,and compares the overall accuracy aplenty of known point and fusion of GPS data 3D laser scanning point cloud.It analyzes the method measuring the error of the size and nature of the error,and determines the applicability of this technology.Taking 3D laser scanner based on Reigl VZ-1000 as an example,the main research for datum network building of small area,measurement and adjustment of the data processing,on the basis of ＂measurement of the engineering＂and ＂urban measurement specifications＂.Through the reconnaissance study,construct net,net shape design,field measurement,establishes the regional benchmark network,and has carried on the elevation closed loop and the closed traverse network adjustment using PA2002 software,thereby gaining a conform to the requirements of the benchmark network.