URL
EDUCAUSE Learning Initiative (2009, August). 7 Things You Should Know About Data Visualization II.
"Data visualization is the use of tools to represent data in the form
of charts, maps, tag clouds, animations, or any graphical means
that make content easier to understand."
Source : EDUCAUSE, 2009.
Click http://net.educause.edu/ir/library/pdf/ELI7052.pdf link to open resource.