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Nominatim

Nominatim (from the Latin, 'by name') is a tool to search OpenStreetMap data by name and address (geocoding) and to generate synthetic addresses of OSM points (reverse geocoding). An instance with up-to-date data can be found at https://nominatim.openstreetmap.org. Nominatim is also used as one of the sources for the Search box on the OpenStreetMap home page.

Documentation

The documentation of the latest development version is in the docs/ subdirectory. A HTML version can be found at https://nominatim.org/release-docs/develop/ .

Installation

The latest stable release can be downloaded from https://nominatim.org. There you can also find installation instructions for the release, as well as an extensive Troubleshooting/FAQ section.

Detailed installation instructions for current master can be found at nominatim.org as well.

A quick summary of the necessary steps:

  1. Create a Python virtualenv and install the packages:

     python3 -m venv nominatim-venv
 ./nominatim-venv/bin/pip install packaging/nominatim-{api,db}

  2. Create a project directory, get OSM data and import:

     mkdir nominatim-project
 cd nominatim-project
 ../nominatim-venv/bin/nominatim import --osm-file <your planet file>

  3. Start the webserver:

     ./nominatim-venv/bin/pip install uvicorn falcon
 ../nominatim-venv/bin/nominatim serve

License

The Python source code is available under a GPL license version 3 or later. The Lua configuration files for osm2pgsql are released under the Apache License, Version 2.0. All other files are under a GPLv2 license.

Contributing

Contributions, bug reports and pull requests are welcome. When reporting a bug, please use one of the issue templates and make sure to provide all the information requested. If you are not sure if you have really found a bug, please ask for help in the forums first (see 'Questions' below).

For details on contributing, have a look at the contribution guide.

Questions and help

If you have questions about search results and the OpenStreetMap data used in the search, use the OSM Forum.

For questions, community help and discussions around the software and your own installation of Nominatim, use the Github discussions forum.