Simon Willison’s Weblog

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3rd November 2025

Research h3o-python — h3o-python delivers efficient Python bindings for the h3o Rust library, enabling fast and convenient access to H3 geospatial indexing from Python. Utilizing PyO3 and packaged with maturin, it allows encoding geographic coordinates into 64-bit H3 cell indexes, decoding indexes, performing neighborhood queries, calculating great-circle distances, and retrieving surface area metrics—all without requiring a separate H3 installation.

This is a beat by Simon Willison, posted on 3rd November 2025.

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