1. Informatie-visualisatie
les 3, 23 feb 2015
Erik Duval
Dept. Computerwetenschappen, KULeuven
http://erikduval.wordpress.com & @ErikDuval
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2. voorbije week…
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3. 3

4. tegen volgende week
• publiek, data, verhaal
• data: ruwe feasibility voldoende voor nu
• visuele alternatieven
• 15” per groep volgende week
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slide van vorige week

5. ?
@ErikDuval
h.p://erikduval.wordpress.com
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6. Infovis Design
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7. B. McDonnel and N. Elmqvist. Towards utilizing gpus in information visualization: A model and
implementation of image-space operations. Visualization and Computer Graphics, IEEE Transactions on,
15(6):1105–1112, 2009.
http://www.infovis-wiki.net/index.php/Visualization_Pipeline
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8. Data
- questions
where, when, how often, …
- audience
domain & visualisation expertise, …
- structure
time, hierarchy, network, 1D, 2D, nD, …
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9. S. Stevens. On the theory of scales of measurement. Science, 103(2684), 1946.

10. Visual mapping
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11. Size
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http://www.informationisbeautiful.net/2009/visualising-the-guardian-datablog/

12. Color
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http://hcil2.cs.umd.edu/trs/99-16/99-16.html

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J. Mackinlay. Automating the design of graphical presentations of relational information. ACM Transactions On Graphics, 5(2):
110–141, 1986.

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J. Mackinlay. Automating the design of graphical presentations of relational information. ACM Transactions On Graphics, 5(2):
110–141, 1986.

15. http://www.ted.com/talks/hans_rosling_shows_the_best_stats_you_ve_ever_seen.html

16. Gestalt principles
Law of Proximity
The closer objects are to each other,
the more likely they are to be
perceived as a group (Ehrenstein,
2004)
Law of Symmetry
Objects must be balanced or
symmetrical to be seen as complete
or whole (Chang, 2002).
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http://www.slideshare.net/chelsc/gestalt-laws-and-design-presentation
http://en.wikipedia.org/wiki/Gestalt_psychology#Gestalt_laws_of_grouping

17. Gestalt principles
Law of Similarity
Objects that are similar, with like
components or attributes are more
likely to be organised together
(Schamber, 1986).
Law of Common Fate
Objects with a common movement,
that move in the same direction, at the
same pace , at the same time are
organised as a group (Ehrenstein, 2004).
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18. Gestalt principles
Law of Continuation
Objects will be grouped as a whole if
they are co-linear, or follow a direction
(Chang, 2002; Lyons, 2001).
Law of Isomorphism
Is similarity that can be behavioural or
perceptual, and can be a response
based on the viewers previous
experiences (Luchins & Luchins, 1999;
Chang, 2002).This law is the basis for
symbolism (Schamber, 1986).
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19. Offer precise controls for sharing on the Internet...
Users should navigate through 50 settings with more than 170 options
Example
Facebook privacy statement
Questions?
How did its complexity change over time?
How does its length compare to privacy statements
of other tools?
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20. How did its complexity change over time?
http://www.nytimes.com/interactive/2010/05/12/business/facebook-privacy.html20

21. How does its length compare to privacy statements
of other tools?
http://www.nytimes.com/interactive/2010/05/12/business/facebook-privacy.html21

22. ?
@ErikDuval
h.p://erikduval.wordpress.com
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23. tegen volgende week
• slides posten op blog
• blog post over wat je geleerd hebt
• uit feedback, voorstellen andere groepen
• geïllustreerd scenario
• concreet, concreet, concreet
• 15” per groep volgende week
• eventueel data met bestaande tools visualiseren
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24. ?
@ErikDuval
h.p://erikduval.wordpress.com
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