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B+ Tree
B+ Tree

fa10 - University of Illinois at Urbana
fa10 - University of Illinois at Urbana

Red-black trees
Red-black trees

Data Structure and access method
Data Structure and access method

hyperoctree
hyperoctree

... A region quadtree for n points in d dimensions is defined as follows: Consider that we have a hypercube large enough to enclose all of the points The region is represented by the root of the ddimensional quadtree ...
A Brief Introduction to Quadtrees and Their Applications
A Brief Introduction to Quadtrees and Their Applications

... a lot of empty nodes. We can cut down on the size of such sparse trees by only storing subtrees whose leaves have interesting data (i.e. “important subtrees”). We can actually cut down on the size even further. When we only keep important subtrees, the pruning process may leave long paths in the tre ...
Logical Operations in Compact Geospatial Quadtrees
Logical Operations in Compact Geospatial Quadtrees

A Library
A Library

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Quadtree



A quadtree is a tree data structure in which each internal node has exactly four children. Quadtrees are most often used to partition a two-dimensional space by recursively subdividing it into four quadrants or regions. The regions may be square or rectangular, or may have arbitrary shapes. This data structure was named a quadtree by Raphael Finkel and J.L. Bentley in 1974. A similar partitioning is also known as a Q-tree. All forms of quadtrees share some common features: They decompose space into adaptable cells Each cell (or bucket) has a maximum capacity. When maximum capacity is reached, the bucket splits The tree directory follows the spatial decomposition of the quadtree.
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