foundations 2 visualization design http ... - datavis 2020
TRANSCRIPT
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Foundations 2Visualization Design
DataVis 2020http://datavis2020.github.io
Dr. Benjamin Bach
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How to makeclimate action
understandable?
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Assignment 1
1. Find two different visualizations (on the internet, in newspapers, TV, etc.). Different means, e.g., a line chart, a node-link diagram.
2. For each visualization, describe three faults and why they are problematic. Make sure to report different faults for each visualization, i.e., in total you should report six faults.
3. For each visualization, propose (sketch) one or two visualizations that solve the identified faults.
4. For each solution you find, argue with a more general visualization guidelines.
5.
6.
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Tips
● Collect many visualizations● Chose the most challenging one● Create several solution● Don't rely on Google Images!!!
○ https://informationisbeautiful.net/
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Too simple:
Too complex:
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Good:
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Tutorial 2: Data Collection
- Collect yourself - Gather from the internet- Obtain from agency..
- Waste / weather / climate - Deforestation- News events- Personal usage- Positive action
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What makes a good visualization?
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17 32
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Visualization Guidelines
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How to decode bubbles?
a)
b)
c)
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Wrong sizes
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Guideline #1
"Don't use area size to compare quantities."
Exception: It can work on maps.
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Truncated Axes
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Guideline #2
"Don't truncate chart axes."
Exception: Except you tell the reader.
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Inverse charts
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Guideline #3
"Don't inverse charts—it is deceiving."
Exception: Except you tell the reader and it serves your purpose.
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Guideline #4
"Be true about your intention."
Exception: none
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Common flaws (from 8 graphics only..)
1. Missing scales2. 3D distortion3. 3D occlusion4. Missing color contrast5. Colors are too similar6. Not B/W safe7. overuse of texture8. Volume as visual variable9. Un-proportional mappings
10. Truncated axes11. Missing titles12. Missing axis labels13. Unnecessary shapes/ink14. Incomplete data
1. Wrong legends2. Bad visual mappings3. Uncommon / unknown design
choices4. Too much clutter5. Misplaced data points6. Long lines, which are hard to
follow7. Missing legends8. Too much information in one
graphic9. Missing descriptions
10. Overlapping graphical elements11. Too many charts in one
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Data-ink ratio
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Guideline #5
"Try to optimize your data-ink ratio"
Exception: ...
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Embellishment: Metaphors
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Embellishment
Metaphor Distractors
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Embellishment
Understanding of embellished charts not worse, but recall after some weeks, much higher.
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What makes a chart memorable?
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Top 10 most memorable: top-left to bottom right for each category.
What makes a chart memorable?
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What makes a chart memorable?
● Color● Human recognizable objects● Low data-ink ratio● Unique visualization types < common graphs
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Guideline #6
"Add embellishment carefully to make your graphic memorable and enjoyable"
Exceptions: Unless it clutters your visualization and obstructs the message.
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Letting in Potential Killers?
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We must do our share!
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Syrian Refugee Distribution:
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Guideline #7
"Chose a title appropriate to your message or data — it will prime your reader. "
Exceptions: none
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Highlight
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Highlight
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Highlight
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Message
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Message
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Message
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Guideline #8
"Highlight what is important "
Exceptions: except you have too many important things to say:
Solution: show another chart (can be the same)
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Layout
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Layout
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Guideline #9
"Annotate what is important "
Exceptions: ?
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Uncertainty
Ruginski et al,: Non-expert interpretations of hurricane forecast uncertainty visualizations, 2012
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Uncertainty
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Guideline #10
"Be clear about uncertaitny "
Exceptions: you are sure about it.
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Balancing design
Familiarity vs. unfamiliarity
Clarity vs. Memorability
Novelty vs. Tradition
Facts vs. Uncertainty
Reader-driven vs. Author-driven
...
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Closing Quotes
Nigel Holmes states: “As long as the artist understands that the primary function is to convey statistics and respects that duty, then you can have fun (or be serious) with the image; that is, the form in which these statistics appear.”
Alberto Cairo calls a Functional Art: “something that achieves beauty not through the subjective, freely wandering self-expression of the painter or sculptor, but through the careful and restrained tinkering of the engineer.”
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Further readings
● Kong, Ha-Kyung, Zhicheng Liu, and Karrie Karahalios. "Frames and slants in titles of visualizations on controversial topics." Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems. 2018.
● Edward Tufte. The Visual Display of Quantitative Information, 1983● Stephen Few: Sometimes we must raise our voices:
http://www.perceptualedge.com/articles/visual_business_intelligence/sometimes_we_must_raise_our_voices.pdf
● Knafflic: Storyelling with data○ Chapter 2: Choosing an effective visual○ Chapter 3: Visual clutter is your enemy○ Chapter 4: Focus on your audiences' attention
● Bateman, Scott, et al. "Useful junk? The effects of visual embellishment on comprehension and memorability of charts." Proceedings of the SIGCHI conference on human factors in computing systems. 2010.
● Borgo, Rita, et al. "An empirical study on using visual embellishments in visualization." IEEE Transactions on Visualization and Computer Graphics 18.12 (2012): 2759-2768.
● Borkin, Michelle A., et al. "What makes a visualization memorable?." IEEE Transactions on Visualization and Computer Graphics 19.12 (2013): 2306-2315.