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Day1-1610-Validating OpenStreetMap

6e20486159c342aeb2f5092f61c4bf5c?s=47 sotm2017
September 01, 2017

Day1-1610-Validating OpenStreetMap

6e20486159c342aeb2f5092f61c4bf5c?s=128

sotm2017

September 01, 2017
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  1. Validating the map State of the Map 2017, Japan user:PlaneMad

    | Arun Ganesh
  2. Crowdsourced data projects

  3. Cities can become shops

  4. Or an office

  5. Or just get a bad name

  6. Why does it happen?

  7. My mouse moved

  8. It’s time to rename my city

  9. This looks prettier

  10. The virus has caught on

  11. This description tag looks useful

  12. Need PokeStop now

  13. This is a nice place to draw

  14. From where? Contributors or Software

  15. 60% of harmful changes are from New contributors Source: OSMCha

  16. New contributors Naturally make mistakes Not aware of OpenStreetMap Not

    aware of contribution guidelines Not familiar with editing tools Not familiar with tagging system Not aware of community
  17. Experienced contributors Make large scale edits Use powerful tools Edit

    important and very complex features Not scared of making a mistake But mistakes happen
  18. More new and active contributors than ever before

  19. Software Simple tools attracts new users Power tools allows large

    scale editing Don’t give powerful tools to new users
  20. Everything breaks

  21. Protecting the map No single strategy can be foolproof We

    need as many eyes on the data as possible
  22. We need to see the data, not the map

  23. Foolproof data validation requires local context

  24. We need accessible tools for community to peer review data

    Over 30 tools listed on OSM Wiki None on the OSM Homepage
  25. 30,000 changesets by 4,000 users everyday. 2000 new users/day

  26. OSMChangesetAnalyzer

  27. Filter changesets by location, date, category..

  28. Visualize a changeset like Achavi

  29. Peer review and tag changesets

  30. 103,680 changesets reviewed 14,133 found with bad quality Use for

    machine learning?
  31. Contribute Source code https://github.com/mapbox/osmcha-frontend/issues Write detectors https://github.com/mapbox/osm-compare

  32. Get in touch arun@mapbox.com Join the OSMCha Workshop on Sunday

    1.30pm