时空数据表达研究

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。

Research on Temporal Representation of Geographic Information

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.