This schematic map shows a simplification of the world’s network of submarine fiber-optic cables.
*Data: The map uses data sourced from cablemap.info. Each node has been assigned to a country, and all nodes located in the same country have been collapsed into a single node. The resulting network has been then abstracted. For the sake of simplicity, many short links have been excluded from the visualization. For instance, it does not show the intricate network of cables under the waters of the Gulf of Mexico, the South and East China Sea, the North Sea, and the Mediterranean Sea. The map instead aims to provide a global overview of the network, and a general sense of how information traverses our planet. (The findings reported below, however, are based on two analysis of the full submarine fiber-optic cable network, and not just the simplified representation shown in the illustration.)
The map also includes symbols referring to countries listed as “Enemies of the Internet” in the 2014 report of Reporters Without Borders. The centrality of the nodes within the network has been calculated using the PageRank algorithm. The rank is important as it highlights those geographical places where the network is most influenced by power (e.g., potential data surveillance) and weakness (e.g., potential service disruption).
Findings... The United States is by far the most connected country in the world, with submarine cable landing points on both coasts that connect it to most other continents. On the other side of the Atlantic, are the second and third most central parts the global network: the United Kingdom and Senegal. The UK has been a pioneer in laying submarine cables since the second half of the nineteenth century, and still controlled almost half of the world’s submarine cables in the 1920s. Senegal is where most of the southern Atlantic cables land, and it will be followed by Nigeria when new cables become operative this year (i.e., the WASACE cable, integrated in the “under construction” section of the “Capes” line in the illustration). Others will soon connect Latin America with Angola and South Africa as well (i.e., the BRICS Cable and SACS cables, again in the “under construction” section of the “Capes” line in the illustration). Europe dominates the immediately subsequent position in the rank. The two most central East-Asian country are China (17th), followed by India (29th), twelve positions below.
Looking at the network at a more fine-grained scale, Alexandria (Egypt) is the world’s most central node, immediately followed by Singapore and Fujairah (United Arab Emirates). The city of Fortaleza in Brazil and the town of Bude in Cornwall (United Kingdom) are the most central single points in Latin America and Europe respectively, and Accra (Ghana) dominates the Sub-Saharan African list. The importance of being central in the submarine fibre-optic cable network... there are no countries with low-cost Internet access that aren’t also relatively well-connected... read more at
*source: Oxford Internet Institute, Oxford University, England (UK)
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