Virtools软件与地理空间数据集成技术研究  

Research on Virtools Software and Geospatial Data Integration Technology

作　　者：刘兴权[1] 唐智华[1] 黄健熙[2] 王利明[3] 蒋成环 

机构地区：[1]中南大学地学与环境工程学院,长沙410083 [2]中国农业大学信息与电气工程学院,北京100083 [3]中国农业科学院农业资源与农业区划研究所,北京100081 [4]中国水电顾问集团勘测设计研究院,贵阳550081

出　　处：《系统仿真学报》2009年第10期2971-2976,共6页Journal of System Simulation

基　　金：中央级公益性科研院所资金项目“雷达数据旱情遥感监测业务运行机制研究”;三维水电专题GIS系统设计与建设(YJ2006-05)

摘　　要：虚拟现实技术是目前研究的热点问题,虚拟"现实"技术在虚拟游戏领域中已经得到了广泛应用,但真正的利用三维来表达现实世界场景的却并不多见。针对虚拟现实技术中的难点问题——真实三维场景建模及三维地理空间数据的存储和管理问题进行深入探讨,并提出了自己的见解:通过利用优秀的三维游戏软件Virtools组织和管理三维数据的优势来存储和管理地理空间数据,并采用了基于视锥剔除算法的2级LOD模型和通用分页管理技术来对地理空间数据进行优化。最后通过北京和济宁两个实验区验证了算法的可行性,实现了地理空间数据的有效组织、管理和存取,达到了三维场景的快速渲染与显示。Virtual Reality technology is a hot issue at present study, virtual ＂reality＂ technology has been widely used in game field, however, the real used of 3-D scenes to express the real world is few and far between seldom seen. A complicated issue - real 3D modeling and 3D geospatial data storage and management was discussed, and the viewpoints were put forward： 3D geospatial data storage and management were realized through the Virtools software, which had the advantages of geospatial data storage and management, and used algorithms of the cone removing, the two-level LOD models and Generic Pager （GP） technology to optimize the 31） geospatial data based on the visual cone eliminating algorithm. Finally, the feasibility of the algorithm was proved by means of experiment in two test areas of Beijing and Jining, and the goals of the effective organization and access of geospatial data and fast rendering of 3D scenes were achieved.

关 键 词：虚拟现实 地理空间数据 视锥剔除算法 通用分页管理技术 LOD模型 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]