Turo, D.Johnson, BrianControlled experiments with novice treemap users and real data highlight the strength of treemaps and provide direction for improvement. Issues discussed include experimental results, layout algorithms, nesting offsets, labeling, animation and small multiple displays. Treemaps prove to be a potent tool for hierarchy display. The principles discussed are applicable to many information visualization situations.en-UScomputational geometryinformation visualizationSystems IntegrationTechnical Report