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Indexing moving objects for directions and velocities queries

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Abstract

Moving object databases are required to support different types of queries with a large number of moving objects. New types of queries namely directions and velocity queries (DV queries), are to be supported and covered. The TPR-tree and its successors are efficient indexes that support spatio-temporal queries for moving objects. However, neither of them support the new DV queries. In this paper, we propose a new index for moving objects based on the TPR*-tree, named Direction and Velocity of TPR*-tree or DV-TPR*-tree, in order to build data a structure based on the spatial, direction and velocity domains. DV-TPR*-tree obtains an ideal distribution that supports and fulfils the new query types (DV queries). Extensive performance studies show that the query performance of DV-TPR*-tree outperforms the TPR-tree and its successors.

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Acknowledgements

This research has been partially funded by the Australian Research Council (ARC) Discovery Project (Project No: DP0987687). The source of our implementations can be downloaded from the following URL: http://users.monash.edu/~dtaniar/MovingObjectIndex-ISF.

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Correspondence to Sultan Alamri.

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Alamri, S., Taniar, D. & Safar, M. Indexing moving objects for directions and velocities queries. Inf Syst Front 15, 235–248 (2013). https://doi.org/10.1007/s10796-012-9367-8

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