Explorative Analysis of Graph Pyramids using Interactive Visualization Techniques

A. Kerren (Germany)


Visualization Software, Graph Pyramids, HCI, Environ mental Sciences


Hierarchies of plane graphs, called graph pyramids, can be used for collecting, storing, and analyzing geographical in formation based on images or other input data. The visu alization of graph pyramids facilitates studies about their structure, such as their vertex distribution or height in re lation of a speciļ¬c input image. Thus, a researcher can debug contraction processes and ask for statistical informa tion. Furthermore, it improves the better understanding of geographical data, like landscape properties or thematical maps. In this paper, we present an interactive visualization tool that supports several coordinated views on graph pyra mids, subpyramids, level graphs, thematical maps, etc. We discuss a brief case study on the basis of a small sample image and conclude the paper with future work.

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