This choropleth map shows the birth countries of football players who participate in the FIFA World Cup 2014. Some tidbits from the data:
Many of players born in France are children of immigrants and have double nationality. Due to France's better training infrastructure players born and/or raised there often have better preconditions than those in Algeria for example.
Since only 23 players can be selected for a country, players may opt for the country of their ancestors rather than not participating at all in international tournaments.
Apart from reasons related to footballing skills, this may also reflect problems of integrating people with foreign roots in France.
You can see the data value for an individual country by moving the mouse over it.
You can zoom in by clicking on a country and zoom out by clicking on the same country or any point on the map outside of countries.
If there is a menu item named
Choose Dataset you can choose different data series to display on the map from that drop down.
You can choose a different color scheme by clicking on the button in the menu.