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Information Visualization 2: Overview and Navigation

Information Visualization 2: Overview and Navigation. Chris North cs3724: HCI. Review. Shneiderman’s Info. Vis. mantra? overview first, zoom&filter, details on demand Mapping data to graphics? 1. data items to visual objects 2. data attributes to visual properties. The Problem. Data.

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Information Visualization 2: Overview and Navigation

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  1. Information Visualization 2:Overview and Navigation Chris North cs3724: HCI

  2. Review • Shneiderman’s Info. Vis. mantra? • overview first, zoom&filter, details on demand • Mapping data to graphics? • 1. data items to visual objects • 2. data attributes to visual properties

  3. The Problem Data Screen a a data data a data data detail zoom O+D F+C trans

  4. Typical Navigation 1D scrollbar 2D scrollbars What’s wrong?

  5. Keyhole Problem • Where am I? • Where can I go? • Where do I want to go? • How do I get there? • Lack of context, overview

  6. Keyhole Problem

  7. Context is Important!

  8. The Problem Data Screen a a data data a data data detail zoom O+D F+C trans

  9. E.g: 3 Overviews of Text (MS Word) Advantages?

  10. 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

  11. Detail Only Overview+Detail Multiple views Zooming Focus+Context Distortion, fisheye Navigation Strategies

  12. Zooming large 2D spaces • Powers of 10 • http://terraserver.homeadvisor.msn.com/image.asp?S=10&T=1&X=2689&Y=20639&Z=17&W=2

  13. Zooming: 2D • KidPad, HiNote, Jazz • http://www.cs.umd.edu/hcil/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?

  14. Overview+Detail: 1D • SeeSoft

  15. Overview+Detail: 2D Overview: Detail: • Zoom factor = 5 Square in overview tightly-coupled to scroll bars of detail

  16. Multiple levels = large scale overview intermediate view • Zoom factor = 125 intermediate view detail view

  17. Multiple Foci Linkit

  18. Focus+Context: 1D • Fisheye Menu:http://www.cs.umd.edu/hcil/fisheyemenu/ • Perspective Wall

  19. Focus+Context: 2D

  20. Comparison • Zooming: • Screen space efficient • 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

  21. Quiz • Spotfire? • TableLens?

  22. Design Exercise

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