DuckDB extension for A5 DGGS

A community extension by Query.Farm brings native support for the (equal-area, pentagonal-cell-based) #A5 Discrete Global Grid System (#DGGS) to #DuckDB. In development since April, the extension includes a set of functions for coordinate conversion, geometry, hierarchy, and utilities, extending DuckDB’s reach into high-performance spatial analysis.
Author

Ralph Straumann

Published

October 19, 2025

Have missed this until now: Query.Farm developed and develops a DuckDB community extension that supports the A5 DGGS1 (see here for more background).

Development started in April. Looking at the repo, the internal version number seems to be at 0.4.2. Somewhat confusingly, the documentation puts the extension under the MIT license, while the repo itself carries the Apache 2.0 license.

Current functionality encompasses the following:

Footnotes

  1. Discrete Global Grid System↩︎