一种高效的带状地形模型和公路模型的建立及无缝叠加方法

根据公路地形模型的特殊性,提出了一种适用于带状公路地形的建模方法,该方法将规则网和不规则网紧密结合,从计算机处理地形模型和公路模型的效率出发,将带状地形模型和公路三维模型进行无缝叠加,使得建模具备实时性。使用该方法,规则网地形模型的建立花费的时间几乎可不计,同时采用不规则网将地形模型和公路模型进行无缝叠加,把不规则网的数量最小化,极大降低计算机的运算量,在实时建立公路三维模型中具有重要意义。并利用这种技术自主开发了"公路数字影像集成系统",为公路设计提供了一个全新、直观、贴近真实的三维平台,能在公路三维选线设计能发挥重要作用。

An Efficient Banded Terrain Model and Road Model Establishment and Seamless Overlay Method

According to the particularity of the road terrain model, a ribbon road terrain modeling method, the method will be the network of rules and irregular network closely integrated, the efficien- cy of computer processing of the terrain model and road model. Ribbon terrain model and three-di- mensional road model seamlessly superimposed, making the modeling with real-time. Using this meth- od, the terrain model of the network of rules to establish the time it takes almost not count irregular network will seamlessly superimposed on the terrain model and road model to minimize the number of irregular network, greatly reducing the amount of computer operations, real time to establish the three-dimensional model of the road is important. Independent development and use of this technolo- gy ＂road digital imaging integrated system for highway design provides a new, intuitive, close to the true three-dimensional platform, can play an important role in highway design of three-dimensional line selection.