Information Visualization: Navigation Chris North cs3724: HCI
Review Shneiderman’s Info. Vis. mantra? Strategies for Multi-D visualization:
1-D and 2-D Spaces 1-D: info has strong 1-D organization text doc, slideshows, video, audio, lists, timelines 2-D: info has strong 2-D organization spreadsheets, graphs, maps, formatted docs, color chooser, images
PowerPoint Slide Sorter Data Space: 1D array of slides Visualization: 2D array, nav 1D
Typical Navigation 1D scrollbar2D scrollbars What’s missing?
Keyhole Problem Where am I? Where can I go? Where do I want to go? How do I get there? Lack of context, overview
Text Overviews (MS Word)
Visual Overview Show me the data! Map, organization (spatial layout of concepts) What information is (not) available? Adds context info, relationships Enables direct access Encourages exploration HCI metrics: Improves user performance, learning time, satisfaction Insight
Navigation Strategies Detail Only Overview+Detail Multiple views Zooming Focus+Context Distortion, fisheye
Zooming: 1D Lifelines:
Zooming large 2D spaces
Zooming: 2D KidPad, HiNote, Jazz Semantic zooming: Don’t just show things at different size change objects to make sense E.g. add/remove detail info Powers of Ten Controls?
Overview+Detail: 1D SeeSoft
Overview+Detail: 1D Home automation: Timeline for scheduling, set on/off flags Calendar shows overview of schedule
Overview+Detail: 2D Overview:Detail: Zoom factor = 5 Square in overview tightly-coupled to scroll bars of detail
Overview+Detail Multiple views: overview detail view Views are linked: Selector in overview navigates detail Navigating detail updates selector in overview
Multiple levels = large scale Zoom factor = 125 overviewintermediate view detail view
Multiple Foci Linkit
Focus+Context: 1D Fisheye Menu: Perspective Wall
Focus+Context: 2D
Comparison Zooming: natural Infinite scalability Lose overview when zoom in Overview+Detail: Good scalability, chaining Multiple foci Disconnect between views, back-n-forth Focus+Context: Integrated overview with detail, connected Least scalable Distortion, overview unstable
Quiz Spotfire? TableLens?