Data visualization is a graphical representation of information. Histograms, scatter charts and maps a simple visualization of data that have been used for decades. Information technology combines the principles of visualization with powerful applications and large data sets to create complex images and animations. Tag Cloud, for example, uses the text size in the relative frequency of use of a set of conditions. In many cases, data that is fed by a tag cloud come from thousands of Web pages, that is, perhaps, millions of users. All of this in formation contained in a simple image ...