Dot distribution maps

I found this off of the census website, and it is a dot distrubution map for the 2000 census with one dot = 7,500 people. This particular map was made to imitate the nighttime maps of the sky and to show what the US might look like if a perfect picture could be taken from space.

http://www.census.gov/geo/www/mapGallery/2kpopden.html