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Add @osmix/layercake package for importing OSM data from OpenStreetMap US Layercake GeoParquet files.

This PR implements issue #38 by providing a new package that converts GeoParquet data (using WKB geometry and JSON tags) into Osmix's in-memory OSM entity format, handling Points as Nodes, LineStrings as Ways, and Polygons/MultiPolygons as Ways or Relations (for areas with holes).


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Replaces custom WKB parser with a library for better support and maintenance.

Co-authored-by: trevorgerhardt <[email protected]>
@trevorgerhardt trevorgerhardt changed the title Implement osm issue 38 Import Layercake/GeoParquet Dec 12, 2025
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3 participants