You provided some good help on this thread (http://registry.gimp.org/node/10774) concerning stippling but I need to take it to the next level. PC PMed me a cool site that creates Traveling Salesman plots but I need a way to convert point plots to X,Y coordinates (see link below to the site for Concorde program). Have any thoughts about this. I know that Sourceforge has GRI (http://sourceforge.net/projects/gri/files/) but to compile it for Windows is not an easy task for me; not even sure it will be what I want anyway. Any thoughts?
http://www.oberlin.edu/math/faculty/bosch/making-tspart-page.html (can find a link to Concorde too, but also, the direct link is here (http://www.tsp.gatech.edu/concorde.html)).