We welcome pull requests to add new regions or tweak existing ones. When proposing changes, please keep in mind that this service is meant to serve as many users as possible. We unfortunately do not have resources to create extracts for every possible slice of the world.
If your change cannot be accepted, we suggest you use PlanetUtils to generate your own OSM extracts on your own local computer or server.
OSM Extracts is inspired by Michal Migurski's Extractotron and Mapzen's Metro Extracts (both now defunct). This GeoJSON file was originally created from the Mapzen Metro Extracts cities.json file using a conversion script. We've preserved the commit history of that file, so you can see all the folks who have contributed to defining these regions over time.
As Mapzen Metro Extracts was released under the ISC license, we've done the same for this repository.
OSM Extracts by Interline also uses the PlanetUtils library; that is released under the MIT license.