One more American divide to examine, ahead of Super Bowl XLVII.

In a West Coast v. East Coast match-up, Baltimore and San Francisco go head-to-head on Sunday. This leaves the rest of the country in a position of taking sides — a problem D.C. Mayor Vincent Gray told The Washington Post was "a tough call."

Lucky for us data-lovers, Americans tell Facebook everything. The Facebook Data Science team culled the site — arguably the world's most extensive database of human preferences — for likes of professional football teams. They explain:

At Facebook we have about 35 million account holders in the United States who have Liked a page for one of the 32 teams in the league, representing one of the most comprehensive samples of sports fanship ever collected. Put another way, more than 1 in 10 Americans have declared their support for an NFL team on Facebook.

In anticipation for Sunday's game, they mapped counties based on whether the San Francisco 49ers or Baltimore Ravens had more "Likes" (ignoring "Likes" for all other teams).

Map from Facebook Data Science

Check out the map that includes all the teams, which tells a much more fractured story:

Map from Facebook Data Science

H/T FlowingData

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