See "non-physical zooming" mapping demoo (Flash) a http://www.sandcodex.com/ for scaling line thicknesses. Presentation at http://66.102.7.104/search?
q=cache:Vf5shp0hzJEJ:www.cni.org/tfms/2004b.fall/abstracts/presentations/CNI_waibel_unimpeded.ppt+sandcodex&hl=en&start=3
Blog of the Chief Imaging Scientist : http://www.shellandslate.com/ (Ben Weiss).

Inkscape is an open source drawing tool with capabilities similar to Illustrator, Freehand, and CorelDraw that uses the W3C standard scalable vector graphics format (SVG). : http://www.inkscape.org/index.php

Milestones in the history of thematic cartography, statistical graphics, and data visualization; Michael Friendly and Daniel J. Denis 18 March 2005 : http://www.math.yorku.ca/SCS/Gallery/milestone/milestone.pdf

http://www.mcescher.com/ Many of the so-called 'impossible' drawings of M. C. Escher can be realized as actual physical objects : http://www.cs.technion.ac.il/~gershon/EscherForReal/

"To have peace with this peculiar life; to accept what we do not understand; to wait calmly for what awaits us, you have to be wiser than I am." - M.C. Escher
"The past only exists insofar as it is present in the records of today. And what those records are is determined by what questions we ask." - Wheeler