Graphics Reference
In-Depth Information
airline. The major hubs per airline are visible where an airport with high
degreehasmanylinesofthesamecolor—forexampleDeltainAtlanta(ATL)
and Minneapolis (MSP), American in Dallas (DFW), and so on.
Figure 7-22:
This shows major air routes in the United States, colored by
airline. See
Figure 7-23
for the visual mapping in Cytoscape.
However, some of those links can be difficult to see, because some airlines
may only have a few flights in the top 500, and it can be difficult to create
a color palette with more than a half dozen or so distinct colors (whereas
here there are a dozen airlines). Therefore, Edge Line Type is used to further
differentiate the edges for those airlines that fly only a few routes, making
them much more readily visible. For example, Alaska Airlines appears as
dotted lines in the top left; Virgin Airlines appears as a fishbone pattern
between San Francisco (SFO), Los Angeles (LAX), and Las Vegas (LAS); and
Shuttle appears as the zigzag edge between Chicago O'Hare (ORD) and New
York LaGuardia (LGA).
