现有的道路三维建模方法只能实现道路模型与地形模型在外观上的整合,其内部关系是完全割裂的.深入研究了一种建立道路三维整体模型的方法.首先将设计点(特征线)与地形点(特征线)整合,形成原始点(特征线)集合.针对原始点集采用逐点插入算法进行Delaunay三角剖分,再依据约束边将初始三角网调整为约束Delaunay三角网,由此得到外观与内部拓扑关系均为整体的道路三维模型.实践表明,该方法具有整体性好、网形优、速度快的优点.图6,参11. The existing road 3D modeling method can only achieve the appearance integration of the road model and the terrain model, and the internal relations of the road model are completely fragmented.A method of building the 3D model of the road is studied in depth.Firstly, the design point ) And the topographic point (feature line) to form the original point (feature line) set.Aiming at the original point set, the point-by-point interpolation algorithm is used to Delaunay triangulation, and then the initial triangulation is adjusted to the constrained Delaunay triangulation The result shows that this method has the advantages of good integrity, good network shape and fast speed.