%0 Report %D 2005 %T Extending the Utility of Treemaps with Flexible Hierarchy (2004) %A Chintalapani,Gouthami %A Plaisant, Catherine %A Shneiderman, Ben %K Technical Report %X Treemaps is 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 paper describes the design and implementation issues of flexible hierarchy. It then reports on a usability study which led to enhancements to the interface. %B Institute for Systems Research Technical Reports %8 2005/// %G eng %U http://drum.lib.umd.edu/handle/1903/6514