Radial Document Visualization
radial document visualization:

a new data visualization method for representing document content by a radial space filling layout technique. "docuburst" aims to provide a more intuitive abstraction than those developed through statistical techniques.
the root node is shown as a circle. all other nodes are assigned to a sector of an annulus with angular width which is part of the parent node’s width, depending on the amount of word occurrences. highly coloured nodes have many occurrences, while almost transparent nodes have few occurrences.
see also: document icons & affective color bar & graphical text similarity.
[link: toronto.edu (PDF) & utoronto.ca (PDF)]
Originally posted by (author unknown) from information aesthetics