data visualization for drought & cross border crisis

Data Visualization for Drought & Cross Border Crisis

October 31, 2013

Angela Zoss Data Visualization Coordinator

Data & GIS Services, 226 Perkins

http://bit.ly/190FS13

http://guides.library.duke.edu/datavis/

Data Visualization

What is Data Visualization?

a general way of talking about anything that converts data sources into a visual representation (charts, graphs, maps, even just tables)

http://guides.library.duke.edu/datavis

Why Visualize?

•  Explain complex concepts quickly and effectively

http://en.wikipedia.org/wiki/Anscombe%27s_quartet

Anscombe’s Quartet

I II III IV

x y x y x y x y

10.0 8.04 10.0 9.14 10.0 7.46 8.0 6.58

8.0 6.95 8.0 8.14 8.0 6.77 8.0 5.76

13.0 7.58 13.0 8.74 13.0 12.74 8.0 7.71

9.0 8.81 9.0 8.77 9.0 7.11 8.0 8.84

11.0 8.33 11.0 9.26 11.0 7.81 8.0 8.47

14.0 9.96 14.0 8.10 14.0 8.84 8.0 7.04

6.0 7.24 6.0 6.13 6.0 6.08 8.0 5.25

4.0 4.26 4.0 3.10 4.0 5.39 19.0 12.50

12.0 10.84 12.0 9.13 12.0 8.15 8.0 5.56

7.0 4.82 7.0 7.26 7.0 6.42 8.0 7.91

5.0 5.68 5.0 4.74 5.0 5.73 8.0 6.89

Property Value

Mean of x 9 (exact)

Variance of x 11 (exact)

Mean of y 7.50 (to 2 decimal places)

Variance of y 4.122 or 4.127 (to 3 decimal places)

Correlation between x and y

0.816 (to 3 decimal places)

Linear regression line y = 3.00 + 0.500x (to 2 and 3 decimal places, respectively)

Why Visualize?

•  Explain complex concepts quickly and effectively

http://en.wikipedia.org/wiki/Anscombe%27s_quartet

Anscombe’s Quartet

Why Visualize?

•  Translate something typically invisible into the visible

http://blogs.library.duke.edu/data/2012/11/12/adding-colored-regions-to-excel-charts/

Why Visualize?

•  Use visuals to contextualize data, tell a story, or possibly even mobilize action around a problem

Hans Rosling – The River of Myths http://www.youtube.com/watch?v=OwII-dwh-bk

http://www.gapminder.org/

CREATING A VISUALIZATION

From Data to Graphic

•  What data types are present in the data source? •  How are the variables likely to relate? •  What visualization type seems to be the best fit for

the goal?

Chart Choosers

http://extremepresentation.typepad.com/blog/2006/09/choosing_a_good.html

Common Visualization Types Showing Space

See LibGuide (http://guides.library.duke.edu/vis_types) for examples and tools.

Common Visualization Types Showing Time

See LibGuide (http://guides.library.duke.edu/vis_types) for examples and tools.

Common Visualization Types Showing Numbers

See LibGuide (http://guides.library.duke.edu/vis_types) for examples and tools.

Common Visualization Types Showing Relationships

See LibGuide (http://guides.library.duke.edu/vis_types) for examples and tools.

Design Tips for Graphics

For general tips on designing charts and graphs, see slides from charting workshop:

Top 10 Dos and Don’ts for Charts and Graphs (http://guides.library.duke.edu/topten)

EXAMPLES

Somalia famine: how the world responded

http://gu.com/p/35jmt

Somalia famine: how the world responded

http://gu.com/p/35jmt

Towards the Environment and Water as Human Rights Alexis Wallace, Kyle Karnuta, and Adrien Comte

http://tinyurl.com/environmentalhumanrights

South Sudan in Movement Stefani Jones, Kendra Kirsonis, Saira Butt, Danielle Mayall

http://sites.duke.edu/southsudaninmovement/

Flight & Expulsion

http://www.niceone.org/lab/refugees/

TOOLS

TimelineJS

http://timeline.knightlab.com/

Timeliner

http://timeliner.okfnlabs.org/

StoryMapJS

http://storymap.knightlab.com/

Tableau

http://guides.library.duke.edu/tableau

JMP Pro

https://oit.duke.edu/comp-print/software/license/detail.php?id=4

http://www.jmp.com/support/help/Essential_Graphing.shtml

Raw

http://raw.densitydesign.org/

ManyEyes

http://www.ibm.com/manyeyes

Plot.ly

https://plot.ly/

Other Tools

•  Google Spreadsheets similar to charts in Excel, but more options and can publish an interactive version of the chart, embed into other websites

•  Silk (http://www.silk.co/) creates websites and basic maps/visualizations in the browser

•  DataWrapper (http://datawrapper.de/) in-browser visualizations (line, bar, pie, donut, table)

GETTING HELP

Data & GIS Services

•  Data collections, LibGuides, etc. http://library.duke.edu/data/

•  Blog (tutorials, announcements, etc.) http://blogs.library.duke.edu/data/

•  Walk-in consultations http://library.duke.edu/data/about/schedule.html (or by appointment – askdata@duke.edu)

•  Perkins 226 computing cluster http://library.duke.edu/data/about/lab.html (fast hardware, diverse software)

•  Additional workshops http://library.duke.edu/data/news/ (listserv – dgs-announce@duke.edu)

Visualization venues at Duke

•  Student Data Visualization Contest •  Flickr gallery

•  Visualization Friday Forum •  LINK MediaWall •  Library exhibit spaces

http://bit.ly/dukevis

http://bit.ly/VFF2013

http://bit.ly/mediawall

http://library.duke.edu/exhibits

http://bit.ly/viscontest14

Student Data Visualization Contest http://bit.ly/viscontest14 | http://bit.ly/visgallery •  Open to Duke students •  Submit any type of visualization •  Deadline January 19 •  2014 Awards:

$250/$150/$100 prizes, public exhibits, posters

QUESTIONS? SUGGESTIONS? angela.zoss@duke.edu http://twitter.com/duke_vis