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location based social networks - towards a research agenda

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location based social networks towards a research agenda Oliver Roick Chair of GIScience Heidelberg University
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Page 1: location based social networks - towards a research agenda

location based social networks

towards a research agenda

Oliver Roick ‣ Chair of GIScience ‣ Heidelberg University

Page 2: location based social networks - towards a research agenda

what are location based social networks?

Page 3: location based social networks - towards a research agenda

social network sites

Messages

Sharing Friends

Page 4: location based social networks - towards a research agenda

social network sites

Messages

Sharing Friends

location

Page 5: location based social networks - towards a research agenda

geosocial networking

Page 6: location based social networks - towards a research agenda

geotagging

Page 7: location based social networks - towards a research agenda

towards a research agenda

Page 8: location based social networks - towards a research agenda

towards a research agenda

quality assesment2

fusion of data sets3

applications & data1

Page 9: location based social networks - towards a research agenda

which applications?1

!"#$%&'()*+,%#-")'

.%,/+-)0'

1%2+3'

4$,+#*",5'

678'

Page 10: location based social networks - towards a research agenda

what data?1

points of interest tracks textual information

Page 11: location based social networks - towards a research agenda

quality positional accuracy2

Mandy's����������� ������������������  Railway����������� ������������������  Dinner����������� ������������������  -����������� ������������������  Heidelberg

Mandy's����������� ������������������  Railway����������� ������������������  Diner

Actual����������� ������������������  position

Page 12: location based social networks - towards a research agenda

quality attribute completeness2

Foursquare Facebook

records overall

full address

city + street

114.284 24.263

(29%)33.528

(52%)59.999

(0%)1

(71%)17.450

street (55%)62.432 (72%)17.504

category (88%)100.852 (100%)24.263

city (67%)76.010 (88%)21.287

Page 13: location based social networks - towards a research agenda

quality2

dataset completeness

temporal evolution

influence of user activity

Page 14: location based social networks - towards a research agenda

fusion problem3

Facebook Foursquare

Page 15: location based social networks - towards a research agenda

fusion the mandy‘s problem3

Page 16: location based social networks - towards a research agenda

3

Mandy's����������� ������������������  Railway����������� ������������������  Diner

Mandy's

Mandy's����������� ������������������  Railway����������� ������������������  Dinner����������� ������������������  -����������� ������������������  Heidelberg

Mandy's����������� ������������������  Diner

Mandy's����������� ������������������  Dinner

American����������� ������������������  Diner

fusion the mandy‘s problem

Page 17: location based social networks - towards a research agenda

fusion geometry conflation3

how to weight geometry?

Mandy's����������� ������������������  Railway����������� ������������������  

Mandy's����������� ������������������  Railway����������� ������������������  Diner

Actual����������� ������������������  position

Page 18: location based social networks - towards a research agenda

fusion attribute conflation3

which is the „most correct“ record?

how can the „most correct“ record be complemented?

Mandy's����������� ������������������  Diner

Mandy'sMandy's����������� ������������������  Dinner

Page 19: location based social networks - towards a research agenda

thank you.questions?


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