- Spatial data
- Dimensionality of space is low, e.g. 2 or 3
- Data types: OGIS data types
- Approximations for extended objects (e.g. linestrings, polygons)
- Minimum Orthogonal Bounding Rectangle (MOBR or MBR)
- Supports filter and refine processing of queries
- Spatial operations
- OGIS operations, e.g. topological, spatial analysis
- Many topological operations are approximated by "Overlap"
- Common spatial queries - listed in next slide
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Última modificación: Friday, 18 de November de 2005, 17:53