I'm one of the 'Wikigraphists' leaders, creating maps for Wikipedia.
We have create several Map Labs :
* http://en.wikipedia.org/wiki/WP:GL/MAP (new)
On the French and German labs, wikigraphists created about 2.000 maps in 3 years.
WIKIPEDIA'S COLORS CONVENTIONS:
We are used to pick up roads data from OpenStreetMap. But we have our own Wiki-skin (colors conventions) :
These conventions and colors have been choice after long talks, for Encyclopedic use : we need less objects than you, but with more vivid colors. Thus, our maps may be include in wiki articles.
NB: we also have our own SVG toolbox :
# Is it possible to customize my account (CSS), to directly get maps display in the Wikipedia style ?
# May some open-street maps programmers think a little about such Wikipedia-OpenStreetMap association.
Please, answer there too :
* http://fr.wikipedia.org/w/index.php?title=Discussion_Wikipédia:Atelier_graphique&action=edit§ion=new (don't clic, pls copy link)