Principles of Analytical Design - Visually Meetup - Sept. 2011

Principles of Analytical DesignNicolas Garcia Belmonte - @philogb - Sept. 2011

I use Web Standards to create Data Visualizations.

I’m the author of two JavaScript data visualization frameworks. PhiloGL JavaScript InfoVis Toolkit

Fundamental Principles of Analytical Design (Tufte)1 - Comparisons2 - Causality, mechanism, structure, explanation3 - Multivariate analysis4 - Integration of evidence5 - Documentation6 - Content counts most of all Source: Edward Tufte - Beautiful Evidence

1 - Show comparisons, contrasts, differences.

Source: Randall Munroe - http://xkcd.com/

Lie Factor“The representation of numbers, as physically measured on the surface of the graphic itself, should be directly proportional to the quantities represented.” Source: Tufte 1991

Lie Factor1985: the line representing 27.5 m/g is 5.3 inches long1978: the line representing 18.0 m/g is 0.6 inches long Lie Factor: 783 / 53 = 14.8! Source: The New York Times

Sometimes it’s useful to emphasize something.

2 - Show causality, mechanism, explanation, systematic structure.

Source: Semiology ofGraphics - Jacques Bertin

Charles Minard’s data-map describes the successive lossesin men of the French army during the French invasion of Russia in 1812 Source: Edward Tufte - Beautiful Evidence

3 - Show multivariate data; that is, show more than 1 or 2 variables.

Channel Ranking vs. Data TypeQuantitative Ordinal Nominal Position Position Position Length Density Hue Angle Saturation Texture Slope Hue Connection Area Texture Containment Volume Connection Density Density Containment Saturation Saturation Length Shape Hue Angle Length Texture Slope Angle Connection Area Slope Containment Volume Area Shape Shape VolumeSource: Tamara Munzner. Chapter 27, p 675-707, of Fundamentals of Graphics, Third Edition, by Peter Shirley et al. AK Peters, 2009

Maps for height, hair color and cephalic index distribution Source: Semiology of Graphics - Jacques Bertin

Map for height, hair color and cephalic index distribution Source: Semiology of Graphics - Jacques Bertin

Source: Reddit.com

4 - Completely integrate words, numbers, images, diagrams.

Source:Vancouver Map

Source: Carmel Map

Source: Zurich Map

Source: The Hague Map

Source: Paris Bus Map

5 - Thoroughly describe the evidence. Provide a detailedtitle, indicate the authors and sponsors, document the data sources, show complete measurement scales, point out relevant issues.

Source: Beautiful Evidence - Edward Tufte

6 - Analytical presentations ultimately stand or falldepending on the quality, relevance and integrity of their content.

Source: Wikipedia

Other Useful Principles 6 - Interactivity 7 - Personalization / Identiﬁcation 8 - Aesthetic value

Other Useful Principles Source: The New York Times

Thanks! Nicolas Garcia Belmonte@philogb http://philogb.github.com/

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Principles of Analytical Design - Visually Meetup - Sept. 2011

by philogb on Sep 30, 2011

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Principles of Analytical Design - Visually Meetup - Sept. 2011 — Presentation Transcript