• 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

Última modificación: Friday, 18 de November de 2005, 17:53