三维GIS模型的分层表示及可视化技术研究  

Layered Representation and Visualization Technique for 3D GIS Model

作　　者：吴慧欣[1] 解丹蕊[1] 薛惠锋[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710072

出　　处：《计算机应用研究》2006年第7期191-192,195,共3页Application Research of Computers

基　　金：霍英东教育基金资助项目(81044)

摘　　要：在分析目前三维GIS建模策略的基础上,根据矿山地质三维数据的特征,提出了三维模型的分层表示策略和基于OpenGL的可视化技术。给定原始的分层数据,结合离散网络模型自动创建控制点之间的拓扑关系,由此建立三维实体的表面模型,加载模型内部属性数据,实现到三维实体模型的转换。然后利用OpenGL造型系统对上述模型进行渲染,进行纹理、光照、消隐、阴影等计算,从而生成高真实感的三维实体模型。最后开发了一套三维G IS仿真系统,并结合实证数据进行了仿真分析。On the basis of analyzing present 3 D GIS modeling methods, a layered representation method is put forward in corresponding to features of 3 D data in geology, which can be visualized by OpenGL technique. In this new method, a layered index mechanism for 3D model data structure is established by dynamic discrete network model, so as to establish topological relations for control points automatically. With loading the inner attribute data to 3D solid surface model ,transformation from twodimensional section to 3D solid has been realized. Then ,the modeling system based on OpenGL is adopted to render the established 3D solid model above. Finally, a 3D GIS sinmlation system has been developed, which provides engineers a new operating platform.

关 键 词：三维模型 地理信息系统 可视化 OPENGL 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]