网络三维GIS空间数据存储及动态拓扑方法  

A method of web 3D GIS spatial data storage and dynamic topology

作　　者：周鹏 刘星 谭浩 ZHOU Peng;LIU Xing;TAN Hao(Anhui University of Science and Technology,Huainan,Anhui 232001,China)

机构地区：[1]安徽理工大学测绘学院,安徽淮南232001

出　　处：《测绘科学》2018年第10期137-143,共7页Science of Surveying and Mapping

摘　　要：针对当前网络环境下三维GIS在拓扑关系的建立与表达、地学数据共享和互操作方面存在的不足,该文提出了一种网络环境下的三维实体拓扑关系构建方法。以关系数据模型来表达点、线、面、体及复杂体5类拓扑元素间的拓扑关系,结合插件式虚拟现实技术,在分布式结构下建立真三维实体的网络发布平台,并实现了三维模型的可视化和三维空间实体拓扑关系的查询。研究表明,该方法能根据三维空间拓扑关系快速重建地理实体,为三维空间数据的交互和共享、网络环境下的真三维空间分析提供新的方案。Aiming at the shortcomings of establishment and expression of the topological relationships,geological data sharing and interoperability in real 3 D GIS fields nowadays,a method of using topological relationships to build 3 Dentity under network environment was proposed in this paper.This method used relational data model to express topological relationships among five topological elements which included node,arc,surface,body,and complex-object,on which basis,combining with plug-in virtual reality technology,network publishing platform of real 3 Dentity depended on distributed structure was built,and visualization of 3 Dmodel and query of topological relationships between 3 Dspatial features was realized.This study showed that the method this paper put forward could reestablish geographic entity rapidly based on 3 Dspatial topological relationships and provide a new solution to share interoperable data and analyze real 3 Dspatial entity under network environment.

关 键 词：拓扑关系 WEB 3D GIS VRML 空间关系查询 数据库 

分 类 号：P208[天文地球—地图制图学与地理信息工程]