Data Visualization

Michael Freeman

{who am I?}

What?
 

Why?

How?

{context for today}

{what is data visualization?}

{what is ethics?}

{what do you want to do with your life?}

Let's try something new...

mfviz.com/info200

{are we on the same page?}

What's the data?

What's the visual encoding?

What's the data?

What's the visual encoding?

What's the data?

What's the visual encoding?

What's the data?

What's the visual encoding?

What's the data?

What's the visual encoding?

What's the data?

What's the visual encoding?

What's the data?

What's the visual encoding?

What's the data?

What's the visual encoding?

So... what is data visualization?

The visual encoding of data to enhance perception.

{lots of definitions}

{why?}

Illumination

Does the wind blow East to West, or West to East?

Exploration

How long do people live?

Impact

How segregated are U.S. cities?

{how?}

Visualization is a design problem

Identify user/audience

Articulate problem scope

Develop personas

Write scenarios

Encode data to solve problems

Maximize how quickly and accurately people decode information from graphics

Maximize how quickly and accurately people decode information from graphics

(Preattentive cognition)

How many 3's are there?

How many 3's are there?

Orientation

Maximize how quickly and accurately people decode information from graphics

Maximize how quickly and accurately people decode information from graphics

(graphical perception)

Most accurate

Least accurate

This only matters if you 

know what is most 

important to your user

What to walk away with

Turning data into information

Thanks!

Michael Freeman

mikefree@uw.edu

mfviz.com

@mf_viz

INFO 498 (tech. foundations)

INFO 343 (web dev.)

INFO 472 (visualization)

info200

By Michael Freeman

info200

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