indexing

[ginanjar <ginjirokato@xxxxxxxxx>]

I work on my thesis on spatial database indeksing using Btree n GiST. 
Can you help to explain how the GiST and btree indexing work in 
postgresql ( the algorithm ) ? Can somone show me how to write code to 
know the tree level and count the root and leaf ?
thanks for the information n help .

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