- Is relational DBMS physical data model suitable for spatial data?
- Relational DBMS has simple values like numbers
- Sorting, search trees are efficient for numbers
- These concepts are not natural for Spatial data (e.g. points in a plane)
- Reusing relational physical data model concepts
- Space filling curves define a total order for points
- This total order helps in using ordered files, search trees
- But may lead to computational inefficiency!
- New spatial techniques
- Spatial indices, e.g. grids, hierarchical collection of rectangles
- Provide better computational performance
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Última modificación: Friday, 18 de November de 2005, 17:43