时空数据库中的时空拓扑查询

The Query of Topological Relationships in Spatio-Temporal Databases

1引言 现代社会大量的科学应用,如航空系统的飞行器导航、森林火灾探测、乃至于人们生活中应用越来越广泛的移动通讯手机等等,这些都导致有必要研究一个能兼顾时空两属性的数据库管理系统.研制一个能有效表示和处理时空对象的DBMS,其中一项重要工作就是对时空对象进行空间分析操作.

In the field of spatio-temporal databases,the algorithms of spatio-temporal query operations are a key problem, where the most important part is on the topological relationships between two objects over time. On the basis of the topological theory of spatial objects,the paper gives abstract definitions of various basic spatio-temporal topological predicates by integrating the factor of time. For the purpose of reflecting sufficiently the dynamic nature of spatio-temporal objects,complex topological predicates are explored. Finally,it gives some applications of Spatio-Temporal Query Language,STQL.