SpaceTree: Supporting Exploration in SpaceTree: Supporting Exploration in Large Node Link Tree, Design Large Node Link Tree, Design Evolution and Empirical Evaluation Evolution and Empirical Evaluation Catherine Plaisant, Jesse Grosjean, Benjamin Catherine Plaisant, Jesse Grosjean, Benjamin B.Bederson B.Bederson in Proceedings of IEEE Symposium on Information Visualization, in Proceedings of IEEE Symposium on Information Visualization, 2002: 57 -64, Boston, October 2002 2002: 57 -64, Boston, October 2002 Presented by Presented by Mei Huang & Chunyuan Liao Mei Huang & Chunyuan Liao 3/10, 2005 3/10, 2005
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SpaceTree: Supporting Exploration in Large Node Link Tree, Design Evolution and Empirical Evaluation Catherine Plaisant, Jesse Grosjean, Benjamin B.Bederson.
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SpaceTree: Supporting Exploration in Large SpaceTree: Supporting Exploration in Large Node Link Tree, Design Evolution and Empirical Node Link Tree, Design Evolution and Empirical
Evaluation Evaluation
Catherine Plaisant, Jesse Grosjean, Benjamin B.BedersonCatherine Plaisant, Jesse Grosjean, Benjamin B.Bederson
in Proceedings of IEEE Symposium on Information Visualization, in Proceedings of IEEE Symposium on Information Visualization,
2002: 57 -64, Boston, October 20022002: 57 -64, Boston, October 2002
Presented by Presented by Mei Huang & Chunyuan LiaoMei Huang & Chunyuan Liao
3/10, 20053/10, 2005
OutlineOutline
MotivationMotivation
Related workRelated work
Highlights of SpaceTreeHighlights of SpaceTree
Controlled ExperimentsControlled Experiments
CommentsComments
DiscussionsDiscussions
MotivationMotivation
Improve classic tree representation (node Improve classic tree representation (node link diagram) by zoomable UI and link diagram) by zoomable UI and animation techniquesanimation techniques
Classic representation is the most familiar Classic representation is the most familiar mapping of a treemapping of a tree
Inefficient space usage makes large tree Inefficient space usage makes large tree exploration not so convenientexploration not so convenient
Zooming & animation can improve user Zooming & animation can improve user experiencesexperiences
Related work (1)Related work (1)
Category 1 : Space fillingCategory 1 : Space filling RepresentativesRepresentatives
TreemapsTreemaps
Information slicesInformation slices
CommentsCommentsFocus on leaf nodes, not the tree topologyFocus on leaf nodes, not the tree topology
Users need training due to unfamiliarityUsers need training due to unfamiliarity
Information Slices
Related work (2)Related work (2)Category 2 : Node linkCategory 2 : Node link
TechniquesTechniquesLayoutLayout : :
V/H hierarchy, Circular layout (hyperbolic tree), 3D diagramV/H hierarchy, Circular layout (hyperbolic tree), 3D diagram
CommentsCommentsClearer and intuitive view of tree topologyClearer and intuitive view of tree topologyChallenge in screen space usageChallenge in screen space usage
Highlights & Early Design lessonsHighlights & Early Design lessons
Semantic zoomingSemantic zooming
Aggressive expandingAggressive expanding
Decomposed tree animationDecomposed tree animation
Landmark Landmark
Search & FilterSearch & Filter
Demo
Hyperbolic BrowserHyperbolic Browser
Lay a whole tree out in Lay a whole tree out in a hyperbolic plane and a hyperbolic plane and map it to a unit diskmap it to a unit disk
John Lamping, Ramana Rao, and Peter Pirolli “A Focus+Context Technique Based on Hyperbolic Geometry for Visualizing Large Hierarchies” Processdings of the ACM SIGCHI Conference on Human Factors in Computing Systems, Denver, May 1995
Circle Limit IV by M.C. Escher
Demo
Comparing SpaceTree, Hyperbolic Tree Browser, Comparing SpaceTree, Hyperbolic Tree Browser, MS Explorer, and TreemapMS Explorer, and Treemap
Task Task typetype Task examplesTask examples
ApplicationsApplications
STST HTHT EpEp TMTM
Node Node locationlocation
Find max/min on some attributeFind max/min on some attribute -- -- -- ++
Find a specific node by titleFind a specific node by title ++ ++ -- ++
A good application of zoomable UI & animationA good application of zoomable UI & animation
Early version review provides very useful Early version review provides very useful informationinformation
Controlled experiments were carefully designed; Controlled experiments were carefully designed; observation explanations were clear and soundobservation explanations were clear and sound
Screen space usage could be improvedScreen space usage could be improved
DiscussionsDiscussions
Checking available space in both Checking available space in both dimensions?dimensions?Alternative summarizersAlternative summarizersLabel several previously visited paths may Label several previously visited paths may be usefulbe usefulHow to deal with large node bounding box?How to deal with large node bounding box?Combining ST with HT?Combining ST with HT?