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Traffic Flow Map
Author(s):
Timothy J. Stronge
Institution:
TeleGeography
Year:
2000
URL:
http://www.telegeography.com/maps/index.php
Project Description:
TeleGeography has produced arguably the best flows maps of the Net thus far, based on the volume of international telephone traffic between nations. Below is an example of one of their handcrafted telecommunications traffic flow maps for the European region.

The map shows countries with traffic flows between them represented as smoothly curving red lines. The thickness of the lines is proportional to the annual volume of traffic between those two countries, measured in millions of minutes of voice telecommunication. (Note: only the principal route pairs, above a set threshold, are shown, to avoid cluttering the map.) Circular symbols, located on the capital city, encode the country's total annual outgoing traffic to all other countries. It is clear from the map that the UK, Germany, and France dominate traffic intra-European flows, forming a powerful triangle at the heart of the continent.

Source: (http://mappa.mundi.net/maps/maps_014/)

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Manuel Lima | VisualComplexity.com