Treemapping

A Tree Map (English for tree map ) is used to visualize hierarchical structures that are here represented by nested rectangles. This vividly size ratios can be represented by the area of ​​the rectangles is chosen proportional to the size of the data to be displayed unit.

History

Invented by this visualization form in the early 1990s, Ben Shneiderman, a professor at the University of Maryland. Because of lack of space on the hard drives of his server he was looking for a way to represent the largest square wasters in an intuitive and straightforward way.