Open Source search based on OpenStreetMap data
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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 Nominatim is also used as one of the sources for the Search box on the OpenStreetMap home page and powers the search on the MapQuest Open Initiative websites.


More information about Nominatim, including usage and installation instructions, can be found in the docs/ subdirectory and in the OSM wiki at:


There are detailed installation instructions in the /docs directory. Here is a quick summary of the necessary steps.

  1. Compile Nominatim:

    mkdir build cd build cmake .. make

    For more detailed installation instructions see docs/ There are also step-by-step instructions for Ubuntu 16.04 and CentOS 7.2.

  2. Get OSM data and import:

    ./build/utils/setup.php --osm-file --all

    Details can be found in docs/

  3. Point your webserver to the ./build/website directory.


The source code is available under a GPLv2 license.

Contact and Bugreports

For questions you can join the geocoding mailinglist, see

Bugs may be reported on the github project site: