Brandon Martin-Anderson’s Census Dotmap is a lovely piece of cartography-meets-data-visualisation. A map of every person counted by the 2010 US and 2011 Canadian censuses, the map has 341,817,095 dots, one for each person.
As Martin-Anderson puts it:
I wanted an image of human settlement patterns unmediated by proxies like city boundaries, arterial roads and state lines… Also, it was an interesting challenge.
Very nice indeed and available in print too.