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Submit a new issue only if you are sure it is a missing feature or a bug. Otherwise discuss the topic on the mailing list first. For new translations or problems in an existing one please refer to this documentation.

We love pull requests. Here's a quick guide:

  1. Fork the repo, optionally create a feature branch

  2. Run the tests. We only take pull requests with passing tests: mvn test

  3. Add a test for your change. Only refactoring and documentation changes require no new tests. If you are adding functionality or fixing a bug, we need a test!

  4. Make the test pass.

  5. Push to your fork and submit a pull request

License Agreement

For contributions like pull requests, bug fixes and translations please read and sign the GraphHopper License Agreement.


  • Tell this your IDE or just use NetBeans which picks the format from pom.xml. E.g. no tabs - use 4 spaces instead!!
  • Follow the conventions you see used in the source already.

And in case we didn't emphasize it enough: we love tests!

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