[pragetruif]

Because I use R quite often, and R just doesn't produce graphs that look like that :).

But yes, it's probably possible to draw an uglier version of the visualization. (I know you can draw the individual points on the plane, so drawing lines between points is probably available as well, though I'm not so sure about the great circles part.)

[bajsejohannes]

Ok. I believe you :) It just seemed simple enough that anything that could do graphics would be able to do it.