JOVE Project: 3D Tree-Mapped Universes and Data Sphere Navigation, A Method 
              to Increase the Density of Hierarchical Information Visualization
              in a Finite Display Space.
Authors     : Pery Pearson  e-mail:pery@hprnd.rose.hp.com, Hewlett-Packard Co.,
              Joe Steinmetz e-mail:joes@core.rose.hp.com, Hewlett-Packard Co.
Date        : 12/05/93


ABSTRACT
A three-dimensional universe of tree-mapped data is proposed that uses
unique navigation techniques and animation to provide a density increase in
visualization.  Some of the limitations of tree-maps and cone trees are
addressed while preserving their benefits.  In addition, "universal" navigation
is presented in a way that promotes context identification rather than
disorientation.  Possible future extensions are introduced in the concluding
sections.

NOTE: the main article is on umd5.umd.edu:~ftp/pub/vrtp/Jove/Articles/InfoViz