General framework for hierarchical object-based index structures |
- Objects bounded by a hyper-dimensional bounding rectangle or bounding box or bounding sphere or bounding convex polygon
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- Total of N objects
![](images/img68.png)
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objects of one level t into a bigger object of the next level
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- Bigger object
at level encompasses all smaller objects at level ![](images/img379.png)
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- Total number of bounding objects is
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![](images/img380.png) |
- Total number of objects is, therefore, still
![](images/img308.png)
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- Hierarchy is called object pyramid
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- Provides multi-resolution representation of database objects
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