Road Network Angiography
Having obtained a rather good and large dataset from the recently instated Greek geodata portal, i was looking for a way to quickly visualise its extent.
I admit to having in my mind those images you sometimes see at doctors practices, where, for example, they would have posters of the muscular or circulatory system, trying (a bit harder than i would feel comfortable with) to convince you of their...interests.
Fortunately, each road segment had a characterisation field attached to it so it was relatively easy to "paint" the highways thicker than smaller streets within populated areas.
The slight detail here is that the thickness of the "arteries" is decreased following a power-law...a little trick that was inspired by the circulatory network itself.
This image appears in this blog post (in Greek, you have been warned :-) ) which talks briefly about road safety in Greece....Yeah, sometimes the street is literally bloody...