Take Flight by Qian Liu from the Media Arts and Technology Graduate Program at UCSB.
Instead of using a world map as background image to locate the cities and countries, we input the latitude and longitude of each city and the central geo location for each country. The data then naturally formed us a global map. Cities and countries are represented by dots with size mapped to a totally volume of departure or arrival routes. We used two planes rather than one, as we believe two planets will better explain the dataset. The planet above (in a red tune: Red - Departure Country / Orange - Departure City) represents the departure cities/countries and the planet below (in a blue tune: Blue - Arrival Country / Green - Arrival City) represents the arriving cities/countries.
And the video is worth checking out as well.