Johnson, B., Shneiderman, B. (April 1991)
This research concerns a novel method for the visualization of hierarchically structured information called Tree-Maps. The visualization technique makes use of 100% of the available display space, mapping the full hierarchy onto a rectangular window in a space-filling manner. This efficient use of space allows very large hierarchies to be displayed in their entirety and facilitates the presentation of semantic information. It is hoped that this approach to the visualization of hierarchical information will produce benefits similar to those achieved by visualization in other areas.