Above is a data visualization created by Sha Hwang to illustrate the increased use of the NYC subway station from 1905 to 2006. While trying to convey information, these graphs are also aesthetically pleasing. Clarity of information is given priority to appearance. Consideration was giving to the color choices, each line has its own distinct color within the same saturation level as the others. The cool gray background acts as a simple backdrop just to give the viewer an environment and recedes so it doesn't complicate the image. It's important to think about how we present this kind of information. It doesn't have to be boring or static, instead I can have more interest in the design than the information I get out of it. I would not be at all as interested about a bar graph created with Excel. Also, these visuals can help the viewer better understand the information they receive.
This one can be found at http://www.diametunim.com/portfolio/ . There are many great examples of data visualization out there. Some are even interactive like http://www.wefeelfine.org/. Others can hold more more specific data like http://www.munterbund.de/visualisierung_textaehnlichkeiten/sketches.php#Examplesoffinalresults or http://well-formed.eigenfactor.org/index.html.
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