This map is an example of a flow map. These types of maps work to show the movement of goods or communications around an area. The map above works to show the traffic flow between the various countries in Europe. The thickness of the line is proportional to the amount of traffic as stated in the legend. The size of the circle encompassing the countries name also works to depict size. These types of maps are helpful in analyzing trends and how they travel. We could look at something such as a disease and look at a flow map of how it has made it's way around the world. It would be a happy way to track an epidemic. These maps can also be vary eye opening as to the amount of traffic that these various countries receive.
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