基于紧密型二三维结合的GIS构架与系统实现

Framework and Realization of 3D GIS System Based on the Integration of 2D GIS System and 3D Rendering Engine

在三维系统中实时渲染二维图层是实现紧密型二三维结合GIS的关键。该文在二三维结合实现三维GIS的基础上,提出了基于LOD(Level of Detail)的二维图层与三维地形叠加的渲染构架和紧密型二三维结合GIS的初步系统构架,并利用ArcGIS Engine开发包与World Wind开源软件实现了该原型系统。系统运行结果表明,该构架完全能够满足紧密型二三维结合GIS对渲染效果和效率的要求,成功解决了紧密型二三维结合系统的关键问题。

Rendering 2D GIS layer in 3D environment is the key problem of realizing compact type of the two and three dimensional integration GIS system. In order to overcome this problem,a rendering architecture based on LOD（Level of Detail） algorithm is proposed by investigating the state-of-the-art in 3D geo-information systems,in particular the way of integrating and combining 2D GIS and 3D visualization technology. And a simple system framework is also constructed to implement a prototype system by using ArcGIS Engine software development kit and World Wind open source software. The results indicate that this framework successfully solves the key problem and could completely meet the requirement from rendering effectiveness and effi- ciency.