基于三维激光扫描技术的大面积平场收方测量实践

Practice of Large Area Flat Field Measurement Based on 3D Laser Scanning Technology

采用自动化的三维激光扫描仪对建设工程大面积的平场场地进行扫描,获取地表面的三维点云数据,通过相关专业处理软件对点云数据处理,从而对地表面建立不规则数字三角网(TIN)模型,进一步构成规则的方格网(Grid)模型,最后基于方格网模型对每一格网进行方量计算。对海量点云数据进行随机均匀抽查验证。首先,采用网络RTK单点定位技术在实地找出(放样)抽检点,然后,实测抽检点的网络RTK高程,求出二者前后差值,以达到检验三维激光扫描精度的目的,从而对三维激光扫描技术在分方或收方工程测量应用的定量和定性评价。

The automatic 3D laser scanner is used to scan a large area of flat field of construction project,obtain the 3D point cloud data of the ground surface,and process the point cloud data through the corresponding professional processing software,so as to establish the irregular digital triangle network(TIN)model of the ground surface,and further form the regular grid model.Finally,based on the grid model calculate the square of each grid.Random and uniform spot check verification of massive point cloud data.First of all,using the single point positioning technology of network RTK to find out(Loft)spot check points in the field,then,measuring the network RTK elevation of spot check points,finding out the difference between the two before and after,so as to achieve the purpose of checking the accuracy of 3D laser scanning,so as to make quantitative and qualitative evaluation on the application of 3D laser scanning technology in the engineering measurement of division or receipt.