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Poornima Badrinath, Mapbox, OSM Validation: Workshop | SotM Asia 2017


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State of the Map Asia (SotM-Asia) is the annual regional conference of OpenStreetMap (OSM) organized by OSM communities in Asia. First SotM-Asia was organized in Jakarta, Indonesia in 2015, and the second was organized in Manila, Philippines in 2016. This year’s conference, third in the series, was organized in Kathmandu, Nepal on September 23 – 24, 2017 at Park Village Resort, Budhanilkantha, Kathmandu, Nepal.

We brought nearly 200 Open Mapping enthusiasts from Asia and beyond to this year’s SotM-Asia. The event provided an opportunity to share knowledge and experience among mappers; expand their network; and generate ideas to expand map coverage and effective use of OSM data in Asian continent. We chose ‘from creation to use of OSM data’ as the theme of this year’s conference, emphasizing on the effective use of OSM data. We also brought together a government panel from four different countries in this year’s SotM-Asia. We believe this event will deepen the bond and enhance collaboration among OSM communities across Asia.

More information about the conference can be found on:

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Poornima Badrinath, Mapbox, OSM Validation: Workshop | SotM Asia 2017

  1. 1. Ensuring the quality of data on OSM By: Chethan Gowda (@chtnha) Poornima Badrinath (@Poornibadrinath)
  2. 2. Agenda • What and Why? • Common errors • General validation practices • Community’s approach and various QA tools • Introduction to OSMCha • Hands on workshop • Questions and feedback
  3. 3. Validating the map • Taking care of the input data flowing into OpenStreetMap • 4 million registered OpenStreetMap users • 4000-5000 daily active users • ~30000 changesets created everyday
  4. 4. • By constant monitoring of your neighbourhood • Unusual map rendering • Spotting common errors while mapping • Information from fellow mappers via IRC, forums • OpenStreetMap Notes Identify data problems
  5. 5. General validation • Visual check: Manual validation • OpenStreetMap Notes • JOSM Validator
  6. 6. Large waterbody on buildings Common Errors
  7. 7. Newbie edits!
  8. 8. Teddy, say Hi!
  9. 9. Pokémon Go edits
  10. 10. ESRI and Swastik
  11. 11. New user edits in Japan!
  12. 12. Very large buildings, peaks, water etc
  13. 13. JOSM Validator (shift+v) How to validate?
  14. 14. Community approach QA Tools Fix suggestion OSM Inspector Yes Keep Right Yes Maproulette Yes OSMOse Yes
  15. 15. OSM Inspector
  16. 16. Keep right
  17. 17. Maproulette
  18. 18. Augmented OSM change viewer (achavi) How to visualise the changes?
  19. 19. How did you contribute? (HDYC) - A Pascal tool Check user profile
  20. 20. OSMCha - OSM Changeset analyser
  21. 21. Basic OSMCha filters!
  22. 22. Filters to get changes details
  23. 23. Process of reviewing changesets!
  24. 24. OSMCha Guide
  25. 25. Github repositories • OSMCha: • OSM-Compare: compare • OSMCha front end: frontend/
  26. 26. Thank you!