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• W2114773789 abstract "Spatio-temporal databases store information about the positions of individual objects over time. In many applications, however, such as traffic supervision or mobile communication systems, only summarized data, like the average number of cars in an area for a specific period, or the number of phones serviced by a cell each day, is required. Although this information can be obtained from operational databases, its computation is expensive, rendering online processing inapplicable. A vital solution is the construction of a spatio-temporal data warehouse. In this paper, we describe a framework for supporting OLAP operations over spatio-temporal data. We argue that the spatial and temporal dimensions should be modeled as a combined dimension on the data cube and we present data structures which integrate spatio-temporal indexing with pre-aggregation. While the well-known materialization techniques require a-priori knowledge of the grouping hierarchy, we develop methods that utilize the proposed structures for efficient execution of ad-hoc group-bys. Our techniques can be used for both static and dynamic dimensions." @default.
• W2114773789 created "2016-06-24" @default.
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• W2114773789 date "2003-06-25" @default.
• W2114773789 modified "2023-10-03" @default.
• W2114773789 title "Indexing spatio-temporal data warehouses" @default.
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• W2114773789 doi "https://doi.org/10.1109/icde.2002.994706" @default.
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