时空数据表达研究  

Research on Temporal Representation of Geographic Information

作　　者：黄照强[1] 冯学智[1] 

机构地区：[1]南京大学地理信息系统与遥感实验室

出　　处：《计算机应用研究》2005年第9期19-21,24,共4页Application Research of Computers

基　　金：国家"973"基金资助项目(2002CB410810);国家自然科学基金资助项目(40301038)

摘　　要：描述了目前时态数据模型和时空数据模型的发展,现已共识时态是任何信息的一个重要属性,但是时态数据库中时态关系代数的基本思路是通过在关系模式上显式化时变语义来进行简单结构的时态数据建模,而时空数据建模中时态对象代数是在对象结构上显式化时变语义来进行复杂结构的时态数据建模,并深入探讨了时空数据模型中地理信息的时间维表达方式,指出了各种时空数据模型存在的主要问题。The paper describes the development of temporal data model and spatiotemporal data model. Temporal is a important theme of any information. But in temporal database the base thought of temporal relational algebra is to show time-changed semantic to model temporal data of simple structure in relational model, therefore in spatio-temporal data model the temporal relational algebra is to show time-changed semantic to model temporal data of complex structure in object structure. The next is to discuss in-depth the representation of time of geographic information in STDM, and indicates several being problems of all kinds of STDM. The paper synthesizes characteristics and studying methods of spatio-temporal data model, and provides that the expression of time of geographic information should consider concrete characteristic and feature of researched object.

关 键 词：时间维 地理信息 时空数据模型 特征 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]