5. Wireless sensors :
• Pros: wrt surveys no limitation in time and high update frequency
• Cons: high costs due to the installation and management of the sensors,
and the spatial limitation.
Addressing Big Societal Challenges with Digital Behavioral Data Workshop @mattemanca
Mobile Phone Network :
• Pros: large scale studies, good update frequency, no limitation in time
and space
• Cons: not free and public availability of the data due to privacy, security,
and proprietary reasons.
New sources of data
6. • Pros: covers all aspects of user behavior and life, no temporal or
spatial limitations, allows large-scale studies, accessible in
(almost) real time
• Cons: Data sampling, might be not fully accessible, etc .
Social Media Data
New sources of data
Addressing Big Societal Challenges with Digital Behavioral Data Workshop @mattemanca
8. Digital Behavioral Data Case Study
Research Question:
To what extent social media data can be exploited to gain knowledge about urban
dynamics and mobility patterns in a city or in a urban area in general?
Barcelona Case study:
Explore urban mobility
patterns: local citizens vs
tourists.
[Using social media to characterize urban mobility patterns: State-of-the-art survey and case-study.
Matteo Manca, Ludovico Boratto, Victor Morell Roman, Oriol Martori i Gallissà, Andreas
Kaltenbrunner – Online Social Networks and Media (OSNEM)]
Addressing Big Societal Challenges with Digital Behavioral Data Workshop @mattemanca
9. Digital Behavioral Data Case Study
Dataset: Tweet published in Barcelona from Jan 01,2015 to Dec 31, 2015
Pre-processing: Data cleaning, filtering and application of a heuristic to classify locals
and tourists;
Addressing Big Societal Challenges with Digital Behavioral Data Workshop @mattemanca
10. Digital Behavioral Data Case Study
One-hop paths performed by users in Barcelona:
Shorter paths are visualized
through warmer colors, the
longer a paths the colder
the color tone.
Addressing Big Societal Challenges with Digital Behavioral Data Workshop @mattemanca
15. ● The most central district (like Ciutat Vella) are more visited during weekends to the
detriment of others like Nou Barris.
● Tourists have the same behavior during working days and during weekends.
● Most of the tourists paths involve the two most touristic districts of Barcelona, i.e.,
Ciutat Vella and Eixample.
● Locals are more likely to cover short or long distances, while tourists are more common
to cover intermediate distances.
● In multi-hop paths, the average distance per hop is inversely proportional to the
number of path hops.
● Independently of the number of path hops, tourists are inclined to perform on average
paths that involve longer hops in comparison to those of the locals.
● The probability to find a user in a location with ranking L can be approximated by the
function 1/L.
Digital Behavioral Data Case Study
Case Study Conclusions
Addressing Big Societal Challenges with Digital Behavioral Data Workshop @mattemanca