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Overcoming the Divide: Interacting Crowdsource and Government Data

Explore the interaction between crowdsource and government data in OpenStreetMap (OSM). Discover the benefits and challenges of using open data and how it contributes to data quality improvement. Examples include the rollstuhlkarte.ch and DIDOK projects. Contact Simon Poole at simon@poole.ch for more information.

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Overcoming the Divide: Interacting Crowdsource and Government Data

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

  2. 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 OpenStreetMap is ...

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

  4. rollstuhlkarte.ch

  5. 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 DIDOK List

  6. Short Walk

  7. Google

  8. OSM

  9. Longish Walk :-)

  10. WRONG Government Data is sometimes ...

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

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

  13. 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 Barriers

  14. The OSM Licence Mixer

  15. 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 Solutions?

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

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