Web Graph Treemaps
From eotcd
Treemap Visualizations
Treemaps are hierarchical visualizations.
View our interactive treemaps relating to GPO subdomains and mimetypes (Protovis visualizations do not work in Internet Explorer):
http://research.library.unt.edu/visualization/treemaps/gpo_treemap.html
http://research.library.unt.edu/visualization/treemaps/gpo_top_level_mimetypes.html
http://research.library.unt.edu/visualization/treemaps/gpo_mimetypes.html