See your social network on this fascinating interactive map based on Facebook data

The close ties between residents of Milwaukee County and southern states along the Mississippi River - the lasting impact of the Great Migration of African-American workers to industrial jobs in northern states - is evident in an interactive map based on Facebook data.

Those connections were striking evident in the map published by the New York Times. The map is based on a study conducted by economists at Facebook, Harvard, Princeton and New York University.

The Times map "shows an index of connectedness, created using friendship links between pairs of anonymous Facebook users from a snapshot of the platform in April 2016."

Users can scroll over counties throughout the country and see what the Times calls "a picture of social connectedness."

The researchers determined that people live close to those who they are linked to.

"Even in the age of the internet, distance matters immensely in determining whom — and, as a result, what — we know," the Times said.

Findings for Milwaukee County, for instance, shows that 61 percent of Facebook friends live within 50 miles; 71 percent within 200 miles and 81 percent within 500 miles.

"The networks that emerge reveal a distinct social fingerprint for each county, influenced by past migration patterns, geographical features and quirks of the local economy — whether, for example, the county is home to a military base, a resort hub or a booming oil industry," the Times says.