GeoSilo by Query.Farm
A DuckDB extension for compact geometry encoding. Delta-encodes coordinates as scaled integers instead of float64 pairs, achieving 3–4x smaller geometry on disk and over the wire compared to standard WKB. Points compress to just 9 bytes (vs 21 bytes WKB).
Full documentation, including installation, usage, the function reference, and cookbook examples, is available at:
https://query.farm/products/extensions/geosilo
INSTALL geosilo FROM community;
LOAD geosilo;