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Crowdsourced Georeferencing for Map Library Collections / Chris Fleet, Senior Map Curator, National Library of Scotland

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Chris Fleet describes the role crowdwourcing can play in providing accurate georeferencing for historic map collections online. Presented at the 6th annual Metadata & Web 2.0 seminar organised by the Cataloguing and Indexing Group in Scotland, held at the National Library of Scotland, 21 June 2013

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Crowdsourced Georeferencing for Map Library Collections / Chris Fleet, Senior Map Curator, National Library of Scotland

  1. 1. Crowdsourced georeferencing for Map Library Collections Chris Fleet, Senior Map Curator, National Library of Scotland CIGS Metadata & Web 2.0 Seminar, 21 June 2013
  2. 2. 1. Advantages of georeferencing maps for libraries 2. Review of other approaches for crowdsourced georeferencing 3. Georeferencer application in NLS and BL 4. Key success factors 5. Future developments Crowdsourced georeferencing for Map Library Collections
  3. 3. Georeferencing workflow
  4. 4. Why georeference maps? 1. To visualise maps in new or better ways 2. To improve access to and retrieval of maps 3. To allow new ways of understanding the content of early maps 4. To allow maps to be integrated with other spatial information 5. To allow maps to be compared more easily to each other
  5. 5. 1. To visualise maps in new or better ways
  6. 6. 1. To visualise maps in new or better ways
  7. 7. 1. To visualise maps in new or better ways
  8. 8. 1. To visualise maps in new or better ways
  9. 9. 1. To visualise maps in new or better ways
  10. 10. 1. To visualise maps in new or better ways
  11. 11. 1. To visualise maps in new or better ways
  12. 12. 2. To improve access to and retrieval of maps
  13. 13. 2. To improve access to and retrieval of maps
  14. 14. 2. To improve access to and retrieval of maps
  15. 15. 2. To improve access to and retrieval of maps
  16. 16. 2. To improve access to and retrieval of maps
  17. 17. Map Images viewer
  18. 18. 2. NLS OS 25 inch sheet boundaries in ScotlandsPlaces
  19. 19. 2. NLS map sheet boundaries in OldMapsOnline
  20. 20. eg. Geo-referencing for understanding the content of early portolan charts 3. To allow new ways of understanding the content of early maps
  21. 21. 4. To allow maps to be integrated with other spatial information eg. height – walled city of Beirut from 18th century
  22. 22. 4. To allow maps to be integrated with other spatial information eg. property ownership
  23. 23. 5. To allow maps to be compared more easily to each other Online versions at: digital.nls.uk/bartholomew
  24. 24. Other approaches – QUAD-G http://www.geography.wisc.edu/research/projects/quad-g/
  25. 25. Other approaches: NYPL Map Warper http://maps.nypl.org/warper/
  26. 26. Other approaches: eHarta http://earth.unibuc.ro/articole/eHarta?lang=en
  27. 27. NLS Georeferencer – projects page http://maps.nls.uk/projects/georeferencer/
  28. 28. NLS Georeferencer – crowdsourced georeferencing
  29. 29. NLS Georeferencer – Georeferencer window
  30. 30. NLS Georeferencer – Georeferencer window
  31. 31. NLS Georeferencer – Georeferencer window
  32. 32. NLS Georeferencer – Visualise window
  33. 33. NLS Georeferencer – Accuracy window
  34. 34. NLS Georeferencer – Control Points in Google fusion table
  35. 35. Georeferenced metadata – MARC extents and GeoTIFF header info Paris, France E 2°13'27"-E 2°28'11"/N 48°54'07"-N 48°48'56" Format for MARC Aleph 034: $$dE0021327$$eE0022811$$fN0485407$$gN0484856 255: $$cE 2°13'27"-E 2°28'11"/N 48°54'07"-N 48°48'56" Driver: GTiff/GeoTIFF Files: 100741793.tif Size is 10642, 8892 Coordinate System is: PROJCS["OSGB_1936_British_National_Grid", GEOGCS["GCS_OSGB 1936", … Origin = (453544.409153918500000,145329.490622364830000) Pixel Size = (0.636277533843237,-0.636277533843237) Metadata: Corner Coordinates: Upper Left ( 453544.409, 145329.491) ( 1d14'0.54"W, 51d12'14.93"N) Lower Left ( 453544.409, 139671.711) ( 1d14'3.57"W, 51d 9'11.77"N) …
  36. 36. NLS Georeferencer - results 1,000 early maps of Scotland - released November 2010  half of the maps were georeferenced in the first 16 months,  some categories of maps, such as town plans, completely georeferenced in this time But...  problems with the registration and login  problems with map image display  passive promotion 2011 developments  improved design and professional instructional video  simpler registration and user logging  statistics and visualisation tools supporting competition in crowdsourcing
  37. 37. BL Georeferencer – Georeference window
  38. 38. BL Georeferencer – Visualise window
  39. 39. BL Georeferencer – Visualise window
  40. 40. BL Georeferencer – Feb 2012 results: “Round One” • 725 maps assigned spatial metadata • Completed in less than one week • Publicity minimal – social media *key* • ~90 participants • Top five completed half the work • Data quality good: <3% had errors >.005
  41. 41. Content relevant Accessibility and convenience of application Activity engaging Immediate results and feedback Competitive crowdsourcing tools Recognition and visible overall contribution Asking the top five contributors BL Georeferencer – What made it work ?
  42. 42. BL Georeferencer – top georeferencers
  43. 43. 44 BL Georeferencer – Competitive widgets
  44. 44. ICC Georeferencer – top contributors’ widgets
  45. 45. Georeferencer: Future Developments Adopt personalisation and localisation tools, including a "My Maps" option, the ability to upload custom scans by individuals, and the translation of the web interface into other European languages beyond English. Include better georeferencing options Add better support for multi-sheet maps and map series. Implement WMS / WMTS services - for georeferenced maps, allowing their presentation in a browser without requiring a Google Earth browser plugin, as well as in other web-mapping applications. Allow annotations of georeferenced maps by users and so exploiting the advantages of semantic links and extraction of textual content (including place names) from the maps themselves.
  46. 46. Crowdsourcing Placenames: Wales1900Cymru Zooniverse Project http://www.cymru1900wales.org/
  47. 47. Thank you NLS Georeferencer: http://maps.nls.uk/projects/georeferencer/ Fleet, Kowal & Pridal, “Georeferencer: Crowdsourced Georeferencing for Map Library Collections”, D-Lib Magazine 18(11/12), November/December 2012 http://www.dlib.org/dlib/november12/fleet/11fleet.html

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