Niklas Elmqvist, Ph.D.


  
ZAME
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Synopsis: A large-scale visualization system based on multiscale matrix representations of aggregated graph data.

News

Details

  • Start date: January, 2007
  • Parent project: hieragg

We present the Zoomable Adjacency Matrix Explorer (ZAME), a visualization tool for exploring graphs at a scale of millions of nodes and edges. ZAME is based on an adjacency matrix graph representation aggregated at multiple scales. It allows analysts to explore a graph at many levels, zooming and panning with interactive performance from an overview to the most detailed views. Several components work together in the ZAME tool to make this possible. Efficient matrix ordering algorithms group related elements. Individual data cases are aggregated into higher-order metarepresentations. Aggregates are arranged into a pyramid hierarchy that allows for on-demand paging to GPU shader programs to support smooth multiscale browsing. Using ZAME, we are able to explore the entire French Wikipedia---over 500,000 articles and 6,000,000 links---with interactive performance on standard consumer-level computer hardware.

People

Publications

  • N. Elmqvist, T.-N. Do, H. Goodell, N. Henry, J.-D. Fekete. ZAME: Interactive Large-Scale Graph Visualization. In Proceedings of the IEEE Pacific Visualization Symposium, pp. 215-222, 2008. [PDF] [YoUTube] [BibTeX] [Website]

Media

Protein-protein interaction graph visualized by ZAME. Protein-protein interaction graph visualized by ZAME. Protein-protein interaction graph visualized by ZAME. French Wikipedia visualized by ZAME. French Wikipedia visualized by ZAME. French Wikipedia visualized by ZAME.