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Harry Wood http://harrywood.co.uk State of the States in OpenStreetMap Where Camp EU session slides
Topics <ul><li>The U.S. free data situation
The state of the States. TIGER data
More imports
250 cities routing grid
Duplicate nodes
'waychains' analysis </li></ul>
“Target Market” <ul><li>U.S. is a big “market”
U.S. is full of... </li><ul><li>Potential OpenStreetMap mappers </li></ul></ul>(Insert GPS ownership stats) <ul><ul><li>Po...
Potential OpenStreetMap data users </li></ul></ul>
OpenStreetMap <ul><li>The Free Wiki World Map
“Open” data
Easily editable. Lots of contributors. Community! </li></ul>
TIGER <ul><li>Topologically Integrated Geographic Encoding and Referencing system
Government. Public Domain
Many organisations / agencies / sources
Massive free data set! </li></ul>
<ul>2008 TIGER imported into OpenStreetMap Complete street map! ? </ul>
 
 
TIGER problems <ul><li>Misaligned roads ←  Main problem
Connectivity along county borders
Over connectedness
Wrong-way motorway
Wrong-way motorway-link
Missing bits of motorway or railway
Only one way to represent a two-carriageway highway
Wrong road classifications
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WhereCamp.EU session: State Of The States in OpenStreetMap

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My session at WhereCamp.EU (http://wherecamp.eu ) - Friday Morning 12th March

Details and related links:

http://www.socialtext.net/wherecamp/index.cgi?wherecamp_eu_session_the_state_of_the_states_in_openstreetmap

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Transcript of "WhereCamp.EU session: State Of The States in OpenStreetMap"

  1. 1. Harry Wood http://harrywood.co.uk State of the States in OpenStreetMap Where Camp EU session slides
  2. 2. Topics <ul><li>The U.S. free data situation
  3. 3. The state of the States. TIGER data
  4. 4. More imports
  5. 5. 250 cities routing grid
  6. 6. Duplicate nodes
  7. 7. 'waychains' analysis </li></ul>
  8. 8. “Target Market” <ul><li>U.S. is a big “market”
  9. 9. U.S. is full of... </li><ul><li>Potential OpenStreetMap mappers </li></ul></ul>(Insert GPS ownership stats) <ul><ul><li>Potential OpenStreetMap developers
  10. 10. Potential OpenStreetMap data users </li></ul></ul>
  11. 11. OpenStreetMap <ul><li>The Free Wiki World Map
  12. 12. “Open” data
  13. 13. Easily editable. Lots of contributors. Community! </li></ul>
  14. 14. TIGER <ul><li>Topologically Integrated Geographic Encoding and Referencing system
  15. 15. Government. Public Domain
  16. 16. Many organisations / agencies / sources
  17. 17. Massive free data set! </li></ul>
  18. 18. <ul>2008 TIGER imported into OpenStreetMap Complete street map! ? </ul>
  19. 21. TIGER problems <ul><li>Misaligned roads ← Main problem
  20. 22. Connectivity along county borders
  21. 23. Over connectedness
  22. 24. Wrong-way motorway
  23. 25. Wrong-way motorway-link
  24. 26. Missing bits of motorway or railway
  25. 27. Only one way to represent a two-carriageway highway
  26. 28. Wrong road classifications
  27. 29. roads joined that shouldn't
  28. 30. roads that cross on different levels get intersection nodes
  29. 31. railway and roads moved so they intersect when they don't
  30. 32. etc...... </li></ul>
  31. 33. More Imports <ul><li>More government data </li><ul><li>Coming available as OpenStreetMap
  32. 34. open data in general gains traction </li></ul><li>How to merge with TIGER data?
  33. 35. How to merge with community data?
  34. 36. How to assess quality? </li><ul><li>“Suitable for a web mapping project”
  35. 37. Fobbed off with low quality data </li></ul><li>How to coordinate as a community? </li><ul><li>Decide not to import </li></ul></ul>
  36. 38. Imports damage community <ul><li>Psychology. TIGER data is off-putting
  37. 39. Fixing is not as fun as raw mapping </li></ul>
  38. 40. Need people editing
  39. 41. Basic Routing Problems <ul><li>Discover data errors by routing
  40. 42. Focus on the interstate network </li></ul>
  41. 43. 250 cities routing grid
  42. 44. “Tortuous” routes >1.5 times longer than straight line distance
  43. 45. Duplicate Nodes
  44. 46. New Duplicate Nodes Map <ul>All dupe nodes updated minutely </ul>
  45. 47. “waychains” analysis <ul><li>Looking just at highway=motorway
  46. 48. Find ways joined end-to-end </li></ul>
  47. 49. Osmosis processing planet.osm 160GB! or 7.3 GB bzipped us-motorways.osm 308MB Diffs us-motorways-simplified.osm 55MB
  48. 50. us-motorways-simplified.osm
  49. 51. Osmosis processing planet.osm 160GB! or 7.3 GB bzipped us-motorways.osm 308MB Diffs us-motorways-simplified.osm 55MB waychains!
  50. 52. Split waychains by 'ref'
  51. 53. HTML report
  52. 54. 'All paired refs' map <ul>Not too good so far </ul>
  53. 55. More waychain pairing needed 290 paired out of 1124 different ref values (25%)
  54. 56. Find problems <ul>Ways which should join the chain </ul>Lots of problems with ref values (unfortunately)
  55. 57. Harry Wood http://harrywood.co.uk State of the States <ul><li>Priority #1 - More community
  56. 58. Priority #2 - Fix data problems
  57. 59. Priority #999999 - Import more crap </li></ul>Open Licensed Map Images from OpenStreetMap.org CC-BY-SA
  58. 60. Harry Wood's interest in internet collaboration and web2.0 technologies lead him to the OpenStreetMap project three years ago, as a hobbyist mapper, and as an increasingly passionate evangelist, community coordinator and developer. Turning this hobby into a profession, he worked at CloudMade developing core features of the OpenStreetMap website and working on products and services which help developers use OpenStreetMap data. In 2010 he joined placr.co.uk to develop their new geo API products, as well as operating as a part-time freelance OpenStreetMap consultant, and humanitarian OpenStreetMap activist. He was also on the organising team for WhereCamp EU http://harrywood.co.uk These slides are (of course) freely re-usable under the Creative Commons Attribution-ShareAlike 2.0 License Map images cc-by-sa2 OpenStreetMap.org contributors. “Pale-dawn” map styles by CloudMade, OpenCycleMap.org, OpenPisteMap.org, öpnvkarte.de Thanks also to thedesignsuperhero.com for free clipart
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