abstract graphic design-like data visualization of the monthly average highest & lowest temperatures recorded for Chicago from 1975 through 2004. see also datacloud. [flickr.com]
I didn't get this at first, the lack of numbers or a legend make it hard to judge scale or what temperature differences the different shades represent. But when you compare the one for New York say ( http://www.flickr.com/photos/cms_/84096614/in/set-1748883/ ), with the one for San Fancisco ( http://www.flickr.com/photos/cms_/84096611/in/set-1748883/ ), then you see a difference.
Did they ever consider readability as useful for this project?
My eyes are bleeding...
Excellent site, added to favorites!!