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Title: Range aggregate processing in spatial databases
Authors: Tao, Yufei
Papadias, Dimitris
Keywords: Database
Spatial database
Range queries
Issue Date: Dec-2004
Citation: IEEE transactions on knowledge and data engineering, v. 16, no. 12, December 2004, p. 1555-1570
Abstract: A range aggregate query returns summarized information about the points falling in a hyper-rectangle (e.g., the total number of these points instead of their concrete ids). This paper studies spatial indexes that solve such queries efficiently and proposes the aggregate Point-tree (aP-tree), which achieves logarithmic cost to the dataset cardinality (independently of the query size) for two-dimensional data. The aP-tree requires only small modifications to the popular multi-version structural framework, and thus can be implemented and applied easily in practice. We also present models that accurately predict the space consumption and query cost of the aP-tree and are, therefore, suitable for query optimization. Extensive experiments confirm that the proposed methods are efficient and practical.
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