沿路径放样建模在3维GIS中的设计与实现

The Design and Implementation of Loft Modeling along Path in 3D GIS

沿路径放样是各种线路工程中应用于3维GIS建模的重要方法。分析了放样算法的基本流程和对比了放样体表面模型的两种构建方法,并在此基础上对核心算法进行了扩展。最后,以铁路景观可视化系统为例,说明了沿路经放样建模设计算法的有效性。

Lofting along path is one of the important methods applied in the modeling of 3D GIS for various line projects. Based on the analysis of the fundamental process of lofting algorithm and the comparison of two approaches to the construction of lofting volume＇surface model, the paper makes an extension on the major algorithm. Finally, the effectiveness of the designed algorithm is proved through its application in the railway visualization system.