OpenStreetMap (OSM) is a project to create a free editable map of the world by collecting geographic data from users. Users can contribute data like streets, trails, and points of interest collected with GPS devices or digitized from aerial imagery. The data is made available under an open license for anyone to use and is rendered into editable maps through tools like JOSM. Over 400,000 users have contributed data since OSM started in 2004.

1. OpenStreetMapOpenStreetMap (OSM) is dedicated to creating and providing geographic data, such as street maps, worldwide, for free. [1][1] http://wiki.openstreetmap.org/wiki/Press

2. Who?Philippe Rieffel

3. Student at the Institute for Geoinformatics

4. Student assistant with GI@School

5. Contact: p.rieffel@uni-muenster.deOpenStreetMap?OpenStreetMap creates and provides free geographic data such as street maps to anyone who wants them. The project was started because most maps you think of as free actually have legal or technical restrictions on their use, holding back people from using them in creative, productive, or unexpected ways. [1][1] http://wiki.openstreetmap.org/wiki/Main_Page

6. OpenStreetMap?Wiki-style approach for geodata

7. Database withnodes, waysandrelations

8. Data isdescribedthrough tags

9. Data + tags (database) canbeusedtorendermaps

10. EverybodycancontributeOpenStreetMap– Stats**asby 16.09.2011 at http://wiki.openstreetmap.org/wiki/Stats

11. OpenStreetMap- Stats*asby 16.09.2011 at http://wiki.openstreetmap.org/wiki/Stats

12. OpenStreetMap – History2004 – Founded

13. 2006 – OpenStreetMapFoundation

14. 2007 – First dataDonations

15. 2008 – 50.000 users

16. 2009 – 100.000 users

17. 2011 – 400.000 usersOpenSreetMap – Data SourcesUser contributions

18. GPS Data

19. From Aerial Imagery

20. Donations

21. Censusdata

22. Official surveydata

23. Commercial dataOpenStreetMap – Licensing Rightnow: CC-BY-SA 2.0

24. Transistionto: Open Database License (OdbL) 1.0