Source: Image of Napoleon Invasion graph, Public Domain http://en.wikipedia.org/wiki/File:Minard.png Image of Pie Chart, Creative Commons http://en.wikipedia.org/wiki/File:English_dialects... Image of Edward Tufte, Creative Commons Image of Metro, Creative Commons Image of 2008 Election, Creative Commons
A callout is a small bit of text attached to a line or graphic pointing to its referral.
Edward Tufte is a Yale Professor who pioneered the field of infographics.
Information graphics is a design practice that presents data visually; this may consist of a simple ratio pie chart to condensing large amounts of complex data into visually digestible formats.
A referent graphic is an icon that refers to an element within the infographic, where the reader can easily surmise information by looking for a specific part of the data.
A thematic graphic is when the actual graphic presenting the data is labeled by color, shape, form, line, or dots.