OpenStreetMap address base: ready for prime time?

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Presentation by Maxim Dubinin at SotM Baltics, 2013. Tartu, Estonia.

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OpenStreetMap address base: ready for prime time?

  1. 1. OpenStreetMap address base: ready for prime time? Maxim Dubinin sim@gis-lab.info SotM Baltics 2013
  2. 2. 2 из 24
  3. 3. 3 из 24 Can OpenStreetMap address database be used to create complete geographic datasets? The Question
  4. 4. 4 из 24 ● Creation of data layers for different features ● Large areas (Russia) ● Thousands objects ● Practical applications Setup
  5. 5. 5 из 24 1. How good is OSM address database and fully automatic geocoding? 2. How much does postprocessing help? 3. How is completeness distributed across Russia? 4. How good is the quality compared to other geocoders? You will find answers here for...
  6. 6. 6 из 24 ● What are the mistakes of geocoding and how it can be improved? ● What is the right scheme for addressing? ● When will OSM take over the world? ...but, nothing about...
  7. 7. 7 из 24 Result — correct lat/long for an address Result ~ data preparation + geocoding + postprocessing ● Data prep — make well structured address ● Geocoding — find lat/long for it with osm.org.ru ● Postprocessing — fix it manually if wrong Some definitions
  8. 8. 8 из 24 ● OpenPolice — where are the local cops in Moscow ● Elections — where are the voting stations in Moscow ● Orphanages — where are the children orphanages in Russia Examples
  9. 9. 9 из 24 1.How good is OSM address database and fully automatic geocoding? 2.How much does postprocessing help? 3.How is quality distributed across Russia? 4.How good is the quality compared to other geocoders? Question 1
  10. 10. 10 из 24 OpenPolice ● Extract all addresses from 112.ru ● Geocode them ● Relate them to buildings in Moscow to get areas of responsibility http://gis-lab.info/qa/openpolice.html
  11. 11. 11 из 24 Results ● Total: ~41000 addresses in Moscow
  12. 12. 12 из 24 1.How good is OSM address database and fully automatic geocoding? 2.How much does postprocessing help? 3.How is quality distributed across Russia? 4.How good is the quality compared to other geocoders? Question 2
  13. 13. 13 из 24 Voting comissions ● Extract all addresses from public database ● Geocode them ● Crowdsource post-processing http://uikgeo.gis-lab.info
  14. 14. 14 из 24 Results ● Total: ~3500 addresses in Moscow ● Before post-processing VS after post-processing
  15. 15. 15 из 24 1.How good is OSM address database and fully automatic geocoding? 2.How much does postprocessing help? 3.How is completeness distributed across Russia? 4.How good is quality compared to other geocoders? Question 3
  16. 16. 16 из 24 Orphanages ● Extract all addresses from public database ● Geocode and post-process them ● All regions of Russia, ~5000 orphanages total, mean 50 per region http://gis-lab.info/qa/detdom.html
  17. 17. 17 из 24 Orphanages ● Buildings before and after post-proc, % total
  18. 18. 18 из 24 Orphanages ● Buildings and streets before and after post-proc, % total
  19. 19. 19 из 24 1.How good is OSM address database and fully automatic geocoding? 2.How much does postprocessing help? 3.How is quality distributed across Russia? 4.How good is the quality compared to other geocoders? Question 4
  20. 20. 20 из 24 No project, just comparison ● Take few hundreds of addresses in different parts of Russia ● Geocode them with OSM and Yandex ● For each point, assign score: Building = 3, street = 2, settlement = 1 ● Sum the scores up ● Compare
  21. 21. 21 из 24 OSM vs Yandex ● Summed scores for geocoding accuracy
  22. 22. 22 из 24 Yandex ● Yandex People's map contribution to total score
  23. 23. 23 из 24 ● Map more ;) ● Improve automatic geocoding ● Create positive feedback loop with geocoding projects How to get better?
  24. 24. 24 из 24 https://github.com/simgislab/osmaddress-sotmbaltics13 Sources for this presentation

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