« Update on Dataviz Workshop 2 | Main | Nothing to see here »


Kenneth Field

To be fair, at least the author of the map used an equal area projection so in terms of the construction, population density can be assumed to be consistent across the map. If they had gone for Mercator, for instance, there would be more blue and the pattern distorted...probably without anyone explaining that problem.


Kenneth: I don't know why one would assume equal population density across the map though.

Jon Peltier

You could show a map of population density next to a plot of density of economic activity (with perhaps more than just two levels), but then it would look a lot like the xkcd comic (http://xkcd.com/1138/).

A companion map might show the differential distribution, the last chart of http://junkcharts.typepad.com/numbersruleyourworld/2014/02/numbersense-and-true-lies.html spread out geographically. This would be the definitive map.

Jon Peltier

Kaiser - Kenneth said consistent, not constant, population density. I think he meant consistently-calculated, because unit area on the map is proportional to geographical unit area.

Data Recovery Utrecht

The first map is just shocking!!!

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.


Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)


Link to Principal Analytics Prep

See our curriculum, instructors. Apply.
Marketing analytics and data visualization expert. Author and Speaker. Currently at Columbia. See my full bio.

Book Blog

Link to junkcharts

Graphics design by Amanda Lee

The Read

Good Books

Keep in Touch

follow me on Twitter