Programming language: Python
License: GNU General Public License v3.0 only
Tags: MapBBCodeShare     Maps And Global Positioning System (GPS)    
Latest version: v3.5.2

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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.


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/ .


Nominatim is a complex piece of software and runs in a complex environment. Installing and running Nominatim is something for experienced system administrators only who can do some trouble-shooting themselves. We are sorry, but we can not provide installation support. We are all doing this in our free time and there is just so much of that time to go around. Do not open issues in our bug tracker if you need help. Use the discussions forum or ask for help on help.openstreetmap.org.

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. Compile Nominatim:

    mkdir build
    cd build
    cmake ..
    sudo make install
  2. Create a project directory, get OSM data and import:

    mkdir nominatim-project
    cd nominatim-project
    nominatim import --osm-file <your planet file>
  3. Point your webserver to the nominatim-project/website directory.


The source code is available under a GPLv2 license.


Contributions, bugreport and pull requests are welcome. For details see [contribution guide](CONTRIBUTING.md).

Questions and help

For questions, community help and discussions you can use the Github discussions forum or join the geocoding mailing list.

*Note that all licence references and agreements mentioned in the Nominatim README section above are relevant to that project's source code only.