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Access structures for fuzzy spatial queries

Spatial data are complex and have spatial components and uncertain properties. It is important to develop effective spatial and aspatial indexing techniques to facilitate spatial and/or aspatial querying for databases that deal with spatial data. In this study we discuss a number of spatial index structures, such as Multi-level grid file (MLGF), R-tree, and R*-tree, for fuzzy spatial and/or aspatial queries.