inthenoosphere:

Map of the Internet 2011

Methodology
Non-Geek Version – The Map of the Internet is a visual representation of all the networks around the world that are interconnected to form the Internet as we know it today. These include small and large Internet service providers (ISPs), Internet exchange points, university networks, and organization networks such as Facebook and Google. The size of the nodes and the thickness of the lines speak to the size of those particular providers and the network connections in relation to one another.

Geek Version – You’re looking at all the autonomous systems that make up the Internet. Each autonomous system is a network operated by a single organization, and has routing connections to some number of neighboring autonomous systems. The image depicts a graph of 19,869 autonomous system nodes, joined by 44,344 connections. The sizing and layout of the autonomous systems are based on their eigenvector centrality, which is a measure of how central to the network each autonomous system is: an autonomous system is central if it is connected to other autonomous systems that are central. This is the same graph-theoretical concept that forms the basis of Google’s PageRank algorithm.

The Map of the Internet image layout begins with the most central nodes and proceeds to the least, positioning them on a grid that subdivides after each order of magnitude of centrality. Within the constraints of the current subdivision level, nodes are placed as near as possible to previously-placed nodes that they are connected to.