location based social networks - towards a research agenda

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location based social networks - towards a research agenda

  1. 1. location basedsocial networkstowards a research agendaOliver Roick ‣ Chair of GIScience ‣ Heidelberg University
  2. 2. what are location basedsocial networks?
  3. 3. social network sites Messages Sharing Friends
  4. 4. social network sites Messages location Sharing Friends
  5. 5. geosocial networking
  6. 6. geotagging
  7. 7. towards a research agenda
  8. 8. towards a research agenda1 applications & data2 quality assesment3 fusion of data sets
  9. 9. 1 which applications? 1%2+3!"#$%&()*+,%#-") .%,/+-)0 4$,+#*",5 678
  10. 10. 1 what data? tracks textual informationpoints of interest
  11. 11. 2 quality positional accuracy Actual
  12. 12.  position Mandys
  13. 13.  Railway
  14. 14.   Diner Mandys
  15. 15.  Railway
  16. 16.   Dinner
  17. 17.  -
  18. 18.  Heidelberg
  19. 19. 2 quality attribute completeness Foursquare Facebookrecords overall 114.284 24.263full address 33.528 (29%) 1 (0%)city + street 59.999 (52%) 17.450 (71%)city 76.010 (67%) 21.287 (88%)street 62.432 (55%) 17.504 (72%)category 100.852 (88%) 24.263 (100%)
  20. 20. 2 qualitydataset completenesstemporal evolutioninfluence of user activity
  21. 21. 3 fusion problem Facebook Foursquare
  22. 22. 3 fusion the mandy‘s problem
  23. 23. 3 fusion the mandy‘s problem Mandys Mandys
  24. 24.  Railway
  25. 25.   Diner American
  26. 26.  Diner Mandys
  27. 27.  Dinner Mandys
  28. 28.  Diner Mandys
  29. 29.  Railway
  30. 30.  Dinner
  31. 31.  -
  32. 32.  Heidelberg
  33. 33. 3 fusion geometry conflationActual
  34. 34.  position Mandys
  35. 35.  Railway
  36. 36.   Diner Mandys
  37. 37.  Railway
  38. 38.   how to weight geometry?
  39. 39. 3 fusion attribute conflationMandys Mandys
  40. 40.  Dinner which is the „most correct“ record? Mandys
  41. 41.  Diner how can the „most correct“ record be complemented?
  42. 42. thank you.questions?

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