Visualization Techniques:
(Technique1): Position of each AS is plotted in polar coordinates, position(radius,
) such that:
Key Visualization Mappings:
(Mapping1): Richer peering relationships are reflected by positions closer to the center of the graph.
(Mapping2): represents the geographic longitude of the AS headquarters. Colored arcs at the perimeter distinguish longitudes of different continents. Names of large cities are placed at their respective longitudinal positions.
(Mapping3): Link color reflects outdegree, from lowest (blue) to highest
(yellow).
(Mapping4): Certain well-known ISPs have been manually labeled.