h3-pg provides Postgres bindings for Uber's H3 hexagonal geospatial index. It exposes core H3 functions plus PostGIS integrations: direct casts to geometry/geography, polygon-to-cells (polyfill), raster summary helpers, and grid operators for distance and tiling. The repo documents extension setup and Postgres-specific operators.
Use when you need H3 indexing and analytics inside Postgres/PostGIS — spatial indexing, grid-based aggregations, converting geometries to H3 cells, efficient raster summaries per cell, or when you need Postgres-native H3 operators for queries.
Useful for agents that can run SQL against Postgres/PostGIS instances or help engineers craft SQL queries (DB-focused agents, SQL-savvy automation tools).
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