"La Geografía de las Redes Sociales Urbanas". Carlos Herrera

1. The geography of
urban networks
@cyague
Dataβeers / Sept 2014

2. Our data
• 3 phone networks, country scope during 6
month. In total, about 7 billion calls
• Mutual links considered (at least one
interaction per direction)
• User are geo-located to their most used
tower (FR and PT) or zip code (SP)

3. What about virality?
Tuesday, November 12, 13

4. Long distance
-1.5<α<-1

5. Are modularity induced communities
What about virality?
geographically clustered?
1 Take the social graph
!
2 Detect communities
!
3 Assign each detected top
level community a color
!
4 Plot towers in the map,
coloring them according the
most common community
among its users
Tuesday, November 12, 13

6. The method permits non-adjacent communities!!!

8. All these results are about
nation-wide social networks

9. All these results are about
nation-wide social networks
Do they hold within cities?

14. R?

15. R?

16. Which is the critical R so that the ball
often contains a connected network?
(*) at least we couldn’t find it

17. There is not (*)
However, we found that if the balls contains at
least an entire city, a giant component emerges
(*) at least we couldn’t find it

19. ConnectionsR beestuwlteen most central actors

20. One more thing

23. ConnectionsR beestuwlteen most central actors