Looks like a map of dark matter to me... Hmmmm. Richard Harshaw Cave Creek, AZ “Remember: your mind works faster than you think.” -----Original Message----- From: az-observing-bounce@xxxxxxxxxxxxx [mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Polakis Sent: Monday, December 31, 2012 1:20 PM To: AZ-Observing@xxxxxxxxxxxxx Subject: [AZ-Observing] Census Dotmap and Light Pollution This is only sort of on-topic for this list, but it sure looks like a light pollution image. In fact, it's a representation of the 2010 census data as 308,450,225 individual dots. Zoom in, and it becomes a sort of grayscale image of population density. http://bmander.com/dotmap/index.html Tom -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.