Research on the Construction of the Spatio-temporal Data Model Based on Multi Granularity

Based on spatio-temporal data model the paper introduces temporal quantification of thought,expressing the spatio-temporal object in the form of space and time multi granularity,Meanwhile according to the design idea of object-oriented and spatio-temporal data model,this paper proposes a method to construct multi granular spatio-temporal conceptual data model and logical model. To achieve the multi granularity organization and management of spatial data.