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《Acta Scientiarum Naturalium Universitatis Pekinensis》 2015-04
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An Atomic Model of Spatiotemporal Query Based on Object-Oriented Snapshot Model

LIU Yuefeng;KANG Wei;Institute of Remote Sensing and Geographic Information System,Peking Key Lab of Spatial Information Integration and Its Applications,Peking University;  
By analyzing the fundamental spatiotemporal characteristics of spatiotemporal objects, six query primitives, which are temporal range, spatial range, spatiotemporal range, temporal relation, spatial relation and attribute state, are proposed based on object-oriented snapshot model. Centered on time, atomic queries are defined, and approaches to constructing complex queries from these atomic queries are proposed. On the purpose of rendering the proposed query model more systematic and adaptable, application semantics are not considered in defining query primitives and atomic queries. In addition, owing to its clear expressiveness in GIS, the model possesses considerable implementability and can serve as the foundation and basis of implementations of spatiotemporal query interfaces in temporal GIS.
【Fund】: 863计划(2009AA12Z217)资助
【CateGory Index】: P208
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