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Interaction & Navigation
• Focus + context, overview & detail – Discussed already!
• Dynamic queries • Brushing & Linking • Zooming • 3D Navigation
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Hover Queries
• Faster than mouse clicks
• Allows rapid scanning
[www.infovis.net]
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Object Size
• Quicker to navigate to large objects (Fitts’ Law)
• But can display more small objects
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Highlighting (Focusing) Focus attention on a subset of the data (from Wills 95, Visual Exploration of Large Structured Datasets)
[www.sims.berkeley.edu/courses/is247/s02/lectures/Lecture3.ppt]
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Brushing & Linking Baseball data (from Wills 95)
select high salaries
avg career HRs vs avg career hits (batting ability)
avg assists vs avg putouts (fielding ability)
how long in majors
distribution of positions played
[www.sims.berkeley.edu/courses/is247/s02/lectures/Lecture3.ppt]
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Linking types of assist behavior to position played (from Wills 95)
[www.sims.berkeley.edu/courses/is247/s02/lectures/Lecture3.ppt]
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Zooming
• Can be fast & effective way to navigate – Must be able to zoom rapidly
• Standard zooming – hard to make intuitive zoom-out control
• Semantic zooming – Different representations at diff scales
• Example: Pad++, Autozoom
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Zooming vs. Multiple Windows
Plumlee & Ware, TOCHI, June 2006
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Plumlee & Ware, TOCHI, June 2006
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Map Design
• Landmarks • Overview
– Overview window – Rapid zooming
• View direction – North up with
direction of travel – Track up
These ideas also apply to abstract information displays!
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3D Navigation
• World in hand / Eyeball in hand • Walking / Flying
• Egocentric vs. Exocentric