Request for suggestions that would be OT if not for the fact that it is VCF related ")

I would like to find some sort of mapping software that will allow me to input a set of longitude and lattitude coordinates and a mileage radius where the coordinates lay. What I am hoping to get is a visual of the preponderance of data points. If you took the VCF East survey (http://www.vintage.org/survey.html) you'll remember that one of the questions was to the effect of "you would come only if it is within X miles" where X was a number you input. So I would like to see where most of the data points and their radius areas intersect. If anyone has any suggestions for some free mapping software of this ilk, please e-mail me privately <sellam(a)vintage.org>rg>. Otherwise I guess I'll just have to write me some :) Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org