Last night’s Super Bowl is one of only a few such contests held in the northern United States — all inside domed stadiums. This map shows the cities that hosted previous games and uses proportional symbols to show how many were played there:
Data source: Pro-football-reference.com
Figured you as a data-journalist may have comments about this new visualization for all the Super Bowl games till date. It’s a free app for iPad and iPhone.
https://itunes.apple.com/us/app/sb-viz/id804007677?ls=1&mt=8