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Project Summary
The PH-Tree is a multi-dimensional spatial index structure. It is a 'trie' version of a quadtree. Properties: no rebalancing, ever. Depth limited to 64 nodes. Fast updates, window queries and kNN queries. Scales very well with large datasets (10M+) and prefers clustered data over evenly distributed data. PDFs with a description can be found in the source code.
In a Nutshell, PH-Tree...
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took an estimated 12 years of effort (COCOMO model)
starting with its first commit in August, 2015
ending with its most recent commit over 1 year ago
Quick Reference
https://github.com/tzaeschke/phtree
Apache License 2.0
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These details are provided for information only. No information here is legal advice and should not be used as such.
This Project has No vulnerabilities Reported Against it
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30 Day SummaryAug 14 2026 — Sep 13 2026
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