Indexing moving points (extended abstract)
PODS '00 Proceedings of the nineteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Query operations for moving objects database systems
Proceedings of the 8th ACM international symposium on Advances in geographic information systems
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Modeling historical and future spatio-temporal relationships of moving objects in databases
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Energy-efficient processing of spatio-temporal queries in wireless sensor networks
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ICCSA'05 Proceedings of the 2005 international conference on Computational Science and Its Applications - Volume Part IV
On the semantics of ST4SQL, a multidimensional spatio-temporal query language
Proceedings of the 16th International Database Engineering & Applications Sysmposium
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Integrating spatio-temporal data as abstract data types into already existing data models is a promising approach to creating spatio-temporal query languages. In this context, an important new class of queries can be identified which is concerned with developments of spatial objects over time, that is, queries ask especially for changes in spatial relationships. Based on a definition of the notion of spatio-temporal predicate we provide a framework which allows to build more and more complex predicates starting with a small set of elementary ones. These predicates can be well used to characterize developments. We show how these concepts can be realized within the relational data model. In particular, we demonstrate how SQL can be extended to enable the querying of developments.