地理信息系统中时空拓扑关系计算表达

针对TGIS时空对象,建立了基于时段时空数据模型,根据9交模型以及基于时段的时间表示方法,定义了TGIS时空对象时空拓扑关系模型,利用代数方法给出了时空拓扑关系计算的规则.能有效地重建时空数据的历史状态,跟踪时空数据的变化,处理一切基于时间的查询,实现对TGIS时空对象时空拓扑关系的计算.

Calculation and Search for the Spatio-temporal Topological Relation of Spatio-temporal Object

This paper focuses on how to build a suitable data model of time combined with space,namely, a spatio-temporal data model. Using 9-Intersection model and time expression based on time-slice, a qualitative model for the spatio-temporal topological relations between temporal GIS objects was defined. Using a algebraic method,the computation rules for spatio-temporal topological relations were obtained. Therefore, we could rebuild historical state of spatio-temporal data, trace the changes of spatio-temporal data, deal with all time-based querying and realize the calculation of the temporal and spatial topological relation of spatio-temporal objects.