location based social networks - towards a research agenda
TRANSCRIPT
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location based social networks
towards a research agenda
Oliver Roick ‣ Chair of GIScience ‣ Heidelberg University
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what are location based social networks?
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social network sites
Messages
Sharing Friends
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social network sites
Messages
Sharing Friends
location
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geosocial networking
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geotagging
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towards a research agenda
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towards a research agenda
quality assesment2
fusion of data sets3
applications & data1
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which applications?1
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what data?1
points of interest tracks textual information
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quality positional accuracy2
Mandy's����������� ������������������ Railway����������� ������������������ Dinner����������� ������������������ -����������� ������������������ Heidelberg
Mandy's����������� ������������������ Railway����������� ������������������ Diner
Actual����������� ������������������ position
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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
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quality2
dataset completeness
temporal evolution
influence of user activity
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fusion problem3
Facebook Foursquare
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fusion the mandy‘s problem3
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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
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fusion geometry conflation3
how to weight geometry?
Mandy's����������� ������������������ Railway����������� ������������������
Mandy's����������� ������������������ Railway����������� ������������������ Diner
Actual����������� ������������������ position
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fusion attribute conflation3
which is the „most correct“ record?
how can the „most correct“ record be complemented?
Mandy's����������� ������������������ Diner
Mandy'sMandy's����������� ������������������ Dinner
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thank you.questions?