location based social networks - towards a research agenda
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location based social networks - towards a research agenda Presentation Transcript

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