My husband has designed software and a website that will map all of the locations in your GEDCOM file to a world map. You can zoom in and out from the whole world to street level. You need to have your gedcom file available on your computer to use this site. We saw some interesting groupings of people when we uploaded ours.
Your gedcom file is randomized and stored anonymously in a database while it is being processed. No lineages are stored at this time just the places that people in your tree have resided, were born or died.
This is a work in progress we have many more exciting features planned.
http://www.gedmap.com/