论文部分内容阅读
探讨了道路施工造成的路域DEM变化区域的精细DEM建模方法。该方法首先把二维道路设计成果处理成三维的特征线要素,构建初始TIN;其次应用统计分析的方法内插求出实测点云中各点在初始TIN上的高程和实测高程之间的差异进行统计分析,验证并修改失真的三维特征线要素;然后与选取的少量地面观测点云构建变化区域的DEM,最终实现了路域变化区域精细DEM的构建方法。以杭瑞高速毕都(毕节至都格)段的道路设计成果和局部三维激光扫描数据为例开展了试验研究,研究表明该方法建立的路域DEM精度高、成本低、观测方式灵活,可广泛推广应用。
This paper discusses the detailed DEM modeling method of road area DEM change caused by road construction. Firstly, the two-dimensional road design results are processed into three-dimensional characteristic line elements to construct the initial TIN. Secondly, statistical analysis is used to interpolate the difference between the elevation and the measured elevation of each point in the measured point cloud on the initial TIN Then the DEM of the changing area is constructed with a small amount of ground observation point cloud. Finally, the construction method of the fine DEM in the changing area of the road is realized. Taking the road design results and local 3D laser scanning data of Bi-to-du grid section of Hangzhou-Rui Expressway as an example, the experimental study is carried out. The results show that the DEM of roadway established by this method has high precision, low cost and flexible observation mode. Widely used.