Slide #1.

Document Collections 2 cs5984: Information Visualization Chris North
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Visualization Strategies • • • • • Cluster Maps Keyword Query Relationships Reduced representation User controlled layout
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Slide #3.

Cluster Maps • Kohonen • Themescapes
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Galaxy of News Cluster map with full text Zooming
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Keyword Query • Tilebars
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VIBE • Korfhage, http://www.pitt.edu/~korfhage/interfaces.html • Documents located between query keywords using spring model
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Slide #7.

VR-VIBE
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Keyword Query • Good: • Reduces the browsing space • Map according to user’s interests • Bad: • What keywords do I use? • What about other related documents that don’t use these keywords? • No initial overview • Mega-hit, zero-hit problem
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Relationships • Show inter-relationships • Matrix or Complete Graph • Similarity measure between all pairs of docs • Threshold level • Salton
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Slide #10.

Variations Docs + Paragraphs Themes
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Slide #11.

Citation Networks • Butterfly Browser • Mackinlay,… (PARC) Butterfly: Left = refs Right = citers Yellow = #citers Blue = visited 3d plot: date, Name, # citers
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Relationships • Better for smaller, more detailed map • Scale up: Network visualization • Good: • Can see more complex relationships between/within documents • Can act like hyperlinks! • Bad: • Finding specific documents • Scale up difficult
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Slide #14.

Reduced Representation • Bederson, “Image browsing” • Rui, Anusha
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User controlled layout • Card, “WebBook and Web Forager” • Mrinmayee, Ming • http://vtopus.cs.vt.edu/~north/infoviz/webbook.mpa
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Slide #16.

Next Week • Tues: 3-D data • Kniss, “Interactive Volume Rendering with Direct Manip” » xueqi, mahesh • Thurs: Workspaces • Robertson, “Task Gallery” » supriya, varun • Upson, “AVS” » christa, jun • Thanksgiving break • Tues 27: Debates • Kobsa, “Empirical comparison of comm infovis systems” » kunal, zhiping
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Slide #17.

Upcoming Sched • • • • • • Tues: 3-D data Thurs: Workspaces Thanksgiving break Tues 27: Debates, 2D vs 3D Thurs 29: How (not) to lie with visualization Dec: project presentations • Dec 7: CHI 2-pagers due, student posters due
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