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A connection map allows to show the connection between several positions on a map. Links can be drawn with a straight line, or more commonly by representing the ‘great circle‘: the shortest

route between them. Knowing that the earth is a sphere, this results in rounded lines that give a really pleasant look to the map. Fortunately, R proposes awesome libraries to plot

these connections. If you plot an important number of connection, don’t forget to use transparency and think about the smartest order of the connection (more important must be added in last).

 

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the GreatCircle library


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