高逼真度三维地理信息系统的研究

在三维地理信息系统(Geography Information System，GIS)中，高效、逼真地模拟现实场景是研究的重要内容之一。因此如何获得精确的场景数据和逼真的场景显示是研究的关键问题。该文对三维地理信息系统中模型的数据采集和构建方法进行了研究，采用OPENGL三维图形技术和基于四叉树的区域分层显示技术，实现了一个可针对具体模型操作和查询分析的高逼真度三维地理信息系统。并在系统中完成了虚拟校园一角的设计。实践证明，该系统所采用的方法和技术能够精确高效的虚拟真实场景，满足虚拟校园或虚拟小区规划的要求。

Study of High Fidelity 3D GIS

In the three-dimension Geography Information System, the high-efficien t and the high-lifelike simulation realistic scene is one of important focuses. So how to obtain the accurate scene data and lifelike scene displaying is a key pr oblem. This paper studies the model data collection and model construction in 3D GIS, and using OPENGL three-dimensional technology and region subdivision displaying based on Quadtrees to realize a high fidelity 3D GIS platform. And the desig n of a virtual part of the campus in the system is finished. The result proves t hat the system can meet the requirements for designing a virtual campus or a vi rtual block.