The geography of urban networks

@cyague Dataβeers / Sept 2014

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)

What about virality?

Tuesday, November 12, 13

Long distance

-1.5<α<-1

What about virality?

Tuesday, November 12, 13

Are modularity induced communities 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

The method permits non-adjacent communities!!!

All these results are about nation-wide social networks

Do they hold within cities?

All these results are about nation-wide social networks

R?

R?

Which is the critical R so that the ball often contains a connected network?

(*) at least we couldn’t find it

There is not (*)

(*) at least we couldn’t find it

However, we found that if the balls contains at least an entire city, a giant component emerges

ResultConnections between most central actors

One more thing

What about virality?

Tuesday, November 12, 13

ResultConnections between most central actors