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2-D. cs5984: Information Visualization Chris North. Powers of 10. Quiz. What is the “keyhole problem”? 4 strategies to solve the keyhole problem for 1D? f+c Detail only Zoom O+d. Information Types. Multi-dimensional: databases,… 1D: timelines,… 2D: maps,… 3D: volumes,…

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slide1

2-D

cs5984: Information Visualization

Chris North

slide3
Quiz
  • What is the “keyhole problem”?
  • 4 strategies to solve the keyhole problem for 1D?
      • f+c
      • Detail only
      • Zoom
      • O+d
information types
Information Types
  • Multi-dimensional: databases,…
  • 1D: timelines,…
  • 2D: maps,…
  • 3D: volumes,…
  • Hierarchies/Trees: directories,…
  • Networks/Graphs: web,…
  • Document collections: digital libraries,…
slide5
2-D
  • Image browsing
  • Maps
  • Photos
  • 2d funcs
  • A powerpiont slide
2 d large spaces
2-D: large spaces
  • http://terraserver.homeadvisor.msn.com/image.asp?S=10&T=1&X=2689&Y=20639&Z=17&W=2
tasks
Tasks?
  • Search for target
  • Patterns
  • Distance
  • Aesthetics
  • Routefinding
detail only
Detail Only
  • Typical image browserMS PhotoEditor
  • Typical map browsermapquest.com
zooming pad
Zooming: Pad++
  • Infinitely zoomable surface (Bederson et al.)
  • Layout information in 2d+scale
  • Interaction: pan+zoom
  • Need more info?Just zoom in!
  • Jazz
pad examples
Pad++ examples
  • Authored spaces (user specified layouts)
  • E.g: filesystem replacement?, presentations, stories
  • HiNote, Kidpad
      • http://www.cs.umd.edu/hcil/jazz/play/
      • http://vtopus.cs.vt.edu/~north/infoviz/hinoteapplet.html
  • Counterpoint: powerpoint with zooming
      • http://www.cs.umd.edu/hcil/counterpoint/
pad examples1
Pad++ examples
  • Automated layouts
  • E.g: File system,web history
pad examples2
Pad++ examples
  • In visualization
pad on edge
Pad++ on edge

Info surface

  • Like ray-tracing

zoom

window

semantic zooming
Semantic Zooming
  • Zooming in, red object turns to blue

label

label

good bad
Good/Bad
  • Good:
      • “step back” to get overview
      • “step forward” for more details
      • Infinite space for more details
      • Visual scale  conceptual scale
  • Bad:
      • get lost because of no overview
      • Need work on input device
overview detail
Overview+Detail

Overview: Detail:

  • Zoom factor = 6

Square in overview coupled to scroll bars of detail

multiple levels large scale
Multiple levels = large scale

overview

intermediate view

  • Zoom factor = 10*10*10=1000

intermediate view

detail view

multiple overviews
Multiple Overviews
  • Can have different data types in each view

Color slice

CaT scan

o d vs detail only
O+D vs Detail-Only
  • Beard & Walker: 2D
  • Chimera: trees
  • North: 1D (lists)
  • Scrollbars are bad!
intermediate views
Intermediate views?
  • Plaisant, “When an Intermediate view matters”
      • abhi, sandeep

Overview

?

Detail view

translucency
Translucency
  • Lieberman, “Macroscope: Powers of Ten Thousand”
      • anusha, mrinmayee
2 d attributes
2-D + Attributes
  • Dynamaps: dynamic queries on maps
assignment
Assignment
  • Thurs: 2-D, focus+context
      • Robertson, “Document Lens”
          • priya, parool
      • Leung, “Bifocal displays”
          • alex, qiang
  • Homework #2 due thurs
next week
Next Week
  • tues: Visual Overview Strategies
      • Stasko, “Information Mural”
          • ben, ahmed
      • Rayson, “Aggregate Towers”
          • anil, supriya
  • thurs: Multiple View Strategies
      • Chi, “Visualization Spreadsheet”
          • mudita, abhi
      • North, “Snap-Together Visualization”
          • varun, kumarl