采用约束Delaunay三角网嵌入算法快速构建大型一体化公路数字影像沙盘模型

The Rapid Construction of Large Integrated Highway Digital Image Table by Using Constraint Delaunay Triangulation Algorithm

首先介绍现有公路三维沙盘建设中存在的缺陷和不足,通过"复杂道路、桥梁、隧道、地形模型一体化无缝成型技术"研究,提出独特的技术流程和高效率的算法,采用路线分组、地形分块、膨胀算法、约束Delaunay三角网嵌入算法、双叶模型算法等自主研发技术,解决了大型公路静态模型自动生成的技术难题,使得构建大型一体化公路数字影像沙盘成为可能,并在实际工程项目中得到了具体应用,该技术同时能在搭建公路三维地理信息系统中发挥重要作用。

This paper introduces the current defects and shortcomings in construction of highway 3D sand table firstly. Through the study on integration of seamless molding technology which covers complex road,bridge,tunnel and terrain model,then propose a unique technological process and high efficient algorithm. By using the independent research and development technology of route packets,terrain block,expansion algorithm,constrained Delaunay triangulation algorithm embedding algorithm,double model,which solve the technical problem of automatic generation of large highway static model,and make it possible to constructing the large-scale integration of highway digital sand table. This technology has been applied in practical projects,and it also can play an important role in the construction of highway three-dimensional geographic information system.