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- W1553398082 abstract "In spatial database systems rectangles are commonly used to approximate real spatial data. A technique that approximates extended objects with a collection of rectangles is the z-ordering method. Since each of these rectangles eventually corresponds to an entry in a spatial index, the object may be referenced several times. This redundancy effect is controllable. In this paper, we present an empirically derived formula to assess the expected redundancy for the z-ordering approximation technique given some simple parameters. After showing the applicability of this formula to a large class of different object geometries, we make use of this result to determine the optimal redundancy for real spatial data by means of theoretical considerations. In order to verify our theoretical results, we conducted several experiments using real spatial data and found a good correspondence." @default.
- W1553398082 created "2016-06-24" @default.
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- W1553398082 date "1995-01-01" @default.
- W1553398082 modified "2023-10-17" @default.
- W1553398082 title "Optimal redundancy in spatial database systems" @default.
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- W1553398082 doi "https://doi.org/10.1007/3-540-60159-7_7" @default.
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