1. Die Interaktion zwischen Crowdsource-Daten und Regierungsdaten. Können wir die Einbahnstrasse überwinden? Simon Poole Swiss OpenStreetMap Association

2. OpenStreetMap is... a free and open crowd-sourced database of geographic information NOT an online map provider a ecosystem of applications and service (commercial) providers a consumer of open data

3. Examples of OGD in OSM U.S. Geological Survey (USGS) French Cadastre Communal administrative borders Switzerland Public transport stops Switzerland (DIDOK)

4. rollstuhlkarte.ch

5. DIDOK List roughly 30'000 public transport stops data is submitted to the BAV by the PT operators contains location information, UIC id is used by the SBB, Google, OSM and many others

6. Short Walk

7. Google

8. OSM

9. Longish Walk :-)

10. Government Data is sometimes... WRONG

11. DIDOK Errors Positional errors in original 2010 import ~15% Roughly 20'000 stops have been “verified”

12. Feedback from the use of OGD in crowd-sourcing projects has the potential to support detecting and removing errors.

13. Barriers Interest  is data quality for the data owner relevant and important?  does the “improver” even want to make his work available (competitive advantage)? Legal  crowdsourcing projects typically have restrictive and potentially viral licences (CC by-SA, ODbL..)  OGD licences don't necessarily have terms that require improvements to be made available

14. The OSM Licence Mixer

15. Solutions? Everybody uses OdbL :-) OSM allows additional distribution licences Technical separation of edits (corrections) to imported data Only use OSM as a hint that data may have to be resurveyed/collected

16. rollstuhlkarte.ch by Thomas Ineichen didok.osmd.ch DIDOK – OSM comparision by Michael Spreng sosm.ch Swiss OpenStreetMap Association Simon Poolesimon@poole.ch