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 Node 1  ·  2400 baud  ·  41 msgs in 6 areas  ·  sysop randogoth
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 Msg  : dopecarpet                                   Area : PLACE
 From : randogoth                                    Date : 05 Mar 2025
 Subj : Dopecarpet & Rugreefer
 Msg  : dopecarpet
 Area : PLACE
 From : randogoth
 Date : 05 Mar 2025
 Subj : Dopecarpet & Rugreefer
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Working for Randonautica I had the idea to develop an API to allow requesting geographic information about coordinates, like whether they are in or near water, within a nature reserve, residential area, or in a forest, or any other geocoded metadata.

Based on publicly available OpenStreetMap data I develpped Dopecarpet, a toolset to generate 4 digit GeoHash tile sized Parquet/GeoJSON/CBOR files from OSM PBF files. It comes with a custom tag filter and a minimal GET API to download the data in different formats.

To retrieve data from the API I also built the Dart library Rugreefer. It converts coordinates into a geohash, fetches a gzipped GeoJSON file from the API, and extracts relevant spatial data such as polygons and lines. The library also supports caching with optional expiration to improve performance.

Repositories

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