The research work presented in this thesis is part of the works' continuity on multi-criteria group (decision-makers) decision-making, particularly in the field ...
Aug 14, 1993 · In estimating selectivity factors for spatial operations, several factors must be considered: the nature of the operation and the ...
The utility of selectivity estimation for spatial operations is widely ... There are two factors affecting the accuracy of the estimation as the number of levels ...
Abstract. We examine the estimation of selectivities for range and spatial join queries in real spatial databases. As we have.
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we study the selectivity of complex spatial queries, where the dependency of operators affects the query result. 3. Selectivity of complex spatial queries.
Estimating selectivity factors of spatial operations. Profile image of Walid G. Aref Walid G. Aref. 1993. See full PDF downloadDownload PDF. Related papers.
Feb 24, 1995 · Abstract. We examine the estimation of selectivities for range and spatial join queries in real spatial databases.
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This paper focuses on estimating (analyz- ing) the selectivity of range queries on spatial databases. We can also use these techniques to estimate the nodes ...
May 14, 2017 · The performance and accuracy of sampling-based techniques rely on many factors including the type of the sample,. i.e., biased or unbiased, and ...
Abstract. Optimizing queries that involve operations on spatial data requires estimating the selectivity and cost of these oper- ations.