面向实体的三维空间数据模型组织方法  

Entity-oriented Method of Three-dimensional Data Model Organization

作　　者：谷胜涛[1] 李景文[1,2] 田丽亚[1] 崔爽[1] 

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]桂林理工大学GIS研究中心,广西桂林541004

出　　处：《地理空间信息》2011年第4期75-77,191,共3页Geospatial Information

基　　金：广西科学研究与技术开发计划资助项目(0992030-1;10100018-2);广西高校优秀人才资助计划资助项目([2009]62);广西区2010年研究生科研创新资助项目(2010105960818M07)

摘　　要：三维空间数据模型是对现实世界模型化的基础,是空间数据组织的概念和方法,反映了现实世界空间实体及实体间的关系。传统的三维数据模型大多从几何特征表达的角度出发,割裂了空间对象个体之间的逻辑联系,不能完整表达地理实体。采用面向对象的思想将地理实体抽象为能独立反映完整空间和逻辑关系的空间对象,提出了面向实体的三维空间数据模型的组织方法;重点探讨了面向实体的三维空间数据模型的描述方法、数据结构、存储方法及其相应的三维模型库与纹理库组织管理。Three-dimensional data model is the basis for the real world modeling.It is also the concept of spatial data organization and methods.It reflect relationships between the real-world spatial entities and entities.Most of the traditional three-dimensional data model express geometric features from the perspective of the space separating the logical connection between the individual objects,which is not the full expression of the geographical entity.In this paper,object-oriented thinking could be abstracted as separate geographical entities which reflected the integrity of the relationship between space and the logical space objects.It was also propose for three-dimensional data model entities,the organizational methods.Focusing on the entity-oriented data model described the three-dimensional methods,data structures,storage methods and the corresponding three-dimensional model of organization and management of library and texture database.

关 键 词：地理实体 逻辑语义 数据模型 

分 类 号：P208[天文地球—地图制图学与地理信息工程]