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Abstract
Spatial join indices are join indices constructed for spatial objects. Similar to join indices in relational database systems, spatial join indices improve efficiency of spatial join operations. In this paper, a spatial-information-associated join indexing mechanism is developed to speed up spatial queries, especially, spatial range queries. Three distance-associated join index structures: basic, ring-structured and hierarchical, are developed and studied. Such join indexing structures can be further extended to include orientation information for flexible applications, which leads to zone-structured and other spatial-information-associated join indices. Our performance study and analysis show that spatial-information-associated join indices substantially improve the performance of spatial queries and that different structures are best suited for different applications.
Notes
†The work was supported in part bt the Natural Sciences and Engineering Research Council of Canada under Grant OGP-0037230 and a research grant from Centre for Systems Science of Simon Fraser University. This paper is a substantial revision of an earlior version of the paper titled Distance-Associated Join Indices for Spatial Range Search appearing in the Proceedings of 18th International Conference on Data Engineering, Tempe, AZ, February 1992, pp, 284-292.