Content for Wednesday, May 27, 2020


  • Chapter 10 in Alberto Cairo, The Truthful Art1
  • Chapter 7 in Kieran Healy, Data Visualization2

It looks like this is a lot of reading, but lots of these are short videos or tweets or interactive websites, so don’t worry!

Questions to reflect on

  • How can you know if a map projection is truthful or misleading?
  • What’s wrong (or not wrong) with using points on maps? Choropleths? Lines?


The slides for today’s lesson are available online as an HTML file. Use the buttons below to open the slides either as an interactive website or as a static PDF (for printing or storing for later). You can also click in the slides below and navigate through them with your left and right arrow keys.

View all slides in new window Download PDF of all slides

Fun fact: If you type ? (or shift + /) while going through the slides, you can see a list of special slide-specific commands.


Videos for each section of the lecture are available at this YouTube playlist.

You can also watch the playlist (and skip around to different sections) here:

  1. Alberto Cairo, The Truthful Art: Data, Charts, and Maps for Communication (Berkeley, California: New Riders, 2016).↩︎

  2. Kieran Healy, Data Visualization: A Practical Introduction (Princeton: Princeton University Press, 2018),↩︎