Creating Maps in Illustrator

Below are online tutorials for creating maps in Adobe Illustrator:

Youtube has a nine part series on Illustrator map creation.

Spoongraphics offers a basic, but well-produced tutorial. Sources  all over the web recommend this site.

Crystal Wilson of the College of Urban Planning at the University of Illinois at Chicago has prepared a useful overview of using Illustrator to describe urban environments. Look specifically at the downloadable zip file.