Presentation to ICA conference, Santiago Chile 17 Nov 2009

1. Crowdsourcing is radically changing the geodata landscape: case study of OpenStreetMap Steve Chilton Middlesex University, UK 24 th International Cartography Conference 15-21 Nov 2009, Santiago, Chile

3. Crowdsourcing http://dictionary.zdnet.com/definition/Crowdsourcing.html Using the general public to do research or other work, which may or may not be paid .... the term may also refer to user-generated content.

4. https://www.mturk.com/mturk/welcome

5. http://www.codinghorror.com/blog/archives/000828.html

6. Investigating MP’s expenses

7. http://www.shoothill.com/

8. http://en.wikipedia.org/wiki/Main_Page http:// www.openstreetmap.org /

10. http://wiki.openstreetmap.org/wiki/Stats

11. OSM is slightly ahead of Google/TeleAtlas worldwide. In Europe, OSM is well ahead. Google is slightly ahead in Oceania, and well ahead in Asia and especially South America. http://blog.fortiusone.com/2008/12/12/openstreetmap-vs-googleteleatlas-street-coverage

12. OSM v OS Meridian OSM is better than Meridian 2 in terms of positional accuracy, and less accurate than Mastermap. Haklay, M., 2008 , How good is OpenStreetMap information? A comparative study of OpenStreetMap and Ordnance Survey datasets for London and the rest of England

13. Source: pers comms and http://twitpic.com/p0h8e

14. Microsoft (Navteq) OpenStreetMap http://www.opengeodata.org/2008/03/

15. http://wiki.openstreetmap.org/wiki/Humanitarian_OSM_Team

16. source: all images from company websites

17. http://www.google.com/mapmaker

18. http://www.bittenandbound.com/2008/10/01/ http://www.imsc.res.in/~indu/JM/2009/JanFeb/Longitude/John_Harrison.jpg