%0 Conference Paper %B Eighth International Conference on Information Visualisation, 2004. IV 2004. Proceedings %D 2004 %T Extending the utility of treemaps with flexible hierarchy %A Chintalapani,G. %A Plaisant, Catherine %A Shneiderman, Ben %K 2D displays %K Computer displays %K Computer science %K data visualisation %K Data visualization %K Educational institutions %K flexible hierarchy %K graphical user interface %K Graphical user interfaces %K hierarchical information %K Nominations and elections %K Switches %K Tree data structures %K Tree graphs %K Treemap 4.0 %K Two dimensional displays %K usability %K visualization technique %X Treemaps are a visualization technique for presenting hierarchical information on two-dimensional displays. Prior implementations limit the visualization to pre-defined static hierarchies. Flexible hierarchy, a new capability of Treemap 4.0, enables users to define various hierarchies through dynamically selecting a series of data attributes so that they can discover patterns, clusters and outliers. This work describes the design and implementation issues of flexible hierarchy. It then reports on a usability study, which led to enhancements to the interface. %B Eighth International Conference on Information Visualisation, 2004. IV 2004. Proceedings %I IEEE %P 335 - 344 %8 2004/07/14/16 %@ 0-7695-2177-0 %G eng %R 10.1109/IV.2004.1320166