Facebook - Global Map

This map is a visualisation of where people live relative to their Facebook friends. Each line connects cities with pairs of friends. The brighter the line, the more friends between those cities.

The lines represent a surprisingly detailed map of the world. Not only are continents visible, certain international borders are apparent as well.

The lines do not represent coasts or rivers or political borders, but real human relationships. Large chunks of the world are missing, such as China and central Africa, where Facebook has little presence.