1. Constructing Overview + Detail Dendrogram-Matrix views Jin CHEN (presenter) Alan M. MacEachren Donna J. Peuquet GeoVISTA Center Department of Geography Penn State University jxc93@psu.edu InfoVis 2009 – Oct 14, Atlantic City, New Jersey

2. Large dendrograms suffer occlusion problems  Occlusion  too nodes are fitted too closely or on top of others  hard to navigate and interact with the hierarchy  hard to identify patterns occlusion

3. Concise overview + detail view A linked detail view displays selected sub-trees Overview displays the backbones of the hierarchy Benefit - no occlusion - easy navigation & interaction - enhanced scalability A new metric for constructing a concise overview

4. Time and Place for our presentation Wednesday, 10:50AM Session of Bioinformatics Visualization