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OpenLR™ - Open, Compact and Royalty-free Dynamic Location Referencing

Welcome to the website of the OpenLR™ project. OpenLR™ is an open source software project launched by TomTom International B.V. in September 2009. This project provides a royalty-free dynamic location referencing method which enables reliable data exchange and cross-referencing using digital maps of different vendors and versions. OpenLR™ will help to enhance existing applications and will generate opportunities for new services.

Since OpenLR™ is open source everyone is invited to contribute to and to enhance the exististing solution. This website offers a reference implementation of the OpenLR method and also provides a complete documentation in terms of software documentation and a technical whitepaper. A detailed presentation on OpenLR™ also addresses both, technical and business issues.

Additonally you can subscribe for free to our OpenLR™ newsletter if you want to get the latest news, changes and announcements. A FAQ (frequently asked questions) section shall answer common questions but feel free to contact us directly if you have further questions or remarks.

The OpenLR™ team

Latest changes:
  • 2013-09-18:
    • Release of OpenLR version 1.4.2
  • 2013-08-21:
    • Release of OpenLR version 1.4.1
  • 2012-12-21:
    • Release of OpenLR version 1.4.0
    • Release of OpenLR tools MapViewer and OTK version 1.4.0
  • 2012-07-11:
    • Publication of new command line toolkit OTK.
  • 2012-01-19:
    • Publication of an errata for the white paper version 1.5
  • 2012-01-17:
    • Publication of an updated white paper version 1.5
    • Release of new software packages (version 1.3.0)
  • 2011-01-21:
    • Publication of an updated white paper version 1.4
    • Release of new software packages (version 1.2.2)
  • 2010-11-23:
    • Publication of an area location proposal and call for comments
  • 2010-08-04:
    • OpenLR™ software implementation version 1.2.1 released. This version provides a new physical format datex2 which supports the Datex II protocol. Additionally a new Physical Format converter tool converts one physical format into another. An updated version of the Map Viewer tool has been released with functional updates and point location support.
  • 2010-07-14:
    • OpenLR™ software implementation version 1.2.0 released. This version adds point location support and corresponds to the white paper version 1.3.
  • 2010-05-25:
    • New white paper version 1.3 released. OpenLR™ now supports point locations and better offsets.
  • 2010-04-08:
    • The command line interface tool is available in version 1.1.1 fixing a bug with an invalid binary location reference.
  • 2010-03-22:
    • The command line interface tool and the map access tool from TomTom are now also available as packages including all required 3rd party libraries.
  • 2010-03-15:
    • Call for comments on changes for point location support and better offsets
  • 2010-02-01:
    • White paper version 1.2
    • OpenLR™ software reference implementation version 1.1.0
    • New packages: Data and XML
    • New tool MapViewer draw maps based on the OpenLR map interface and provides encoding and decoding
  • 2009-12-11:
    • White paper version 1.1