In computer science, a k-d tree (short for k-dimensional tree) is a space-partitioning data structure for organizing points in a k-dimensional space. k-d trees are a useful data structure for several applications, such as searches involving a multidimensional search key (e.g. range searches and nearest neighbor searches). k-d trees are a special case of binary space partitioning trees.
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... It is also possible to define a k-d tree with points stored solely in leaves ... This form of k-d tree allows a variety of split mechanics other than the standard median split ...
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“The tree of Knowledge is a Tree of Knowledge of good and evil.”
—Henry David Thoreau (18171862)