The Priority R-Tree: A Practically Efficient and Worst-Case-Optimal R-Tree

  title={The Priority R-Tree: A Practically Efficient and Worst-Case-Optimal R-Tree},
  author={Lars Arge and Mark de Berg and Herman J. Haverkort and Ke Yi},
  journal={ACM Trans. Algorithms},
We present the Priority R-tree, or PR-tree, which is the first R-tree variant that always answers a window query using O((N/B)1 1/d + T/B) I/Os, where N is the number of d-dimensional (hyper-) rectangles stored in the R-tree, B is the disk block size, and T is the output size. This is provably asymptotically optimal and significantly better than other R-tree variants, where a query may visit all N/B leaves in the tree even when T = 0. We also present an extensive experimental study of the… CONTINUE READING
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