Marvellous visualization of where friends tend to cluster in Facebook. Apparently everyone in Dixie knows someone in Atlanta and all the Mormons are friends with each other.

My latest visualization shows the information by location, with connections drawn between places that share friends. For example, a lot of people in LA have friends in San Francisco, so there’s a line between them.

Looking at the network of US cities, it’s been remarkable to see how groups of them form clusters, with strong connections locally but few contacts outside the cluster. For example Columbus, OH and Charleston WV are nearby as the crow flies, but share few connections, with Columbus clearly part of the North, and Charleston tied to the South:

Take a look at his country-level visualization too.