Content for Monday, July 10, 2023–Friday, July 14, 2023


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!

Possible questions to reflect on

This is not a required list!

Remember, you don’t need to answer all of these—or even any of them! These are just here to help guide your thinking. Write about whatever you want.

  • 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?

Other resources

If you want to understand how the magic geometry column actually works, check out this fantastic post.

Check out this post where someone used {ggplot2} and {sf} to create fancy city map-based art that she printed for a friend. You can do similar things after this session!

In addition to the example for this session, you can check out this tutorial on using the {sf} package to create maps. It shows how to include fancy map stuff like a north arrow and scale bar.


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:


Cairo, Alberto. 2016. The Truthful Art: Data, Charts, and Maps for Communication. Berkeley, California: New Riders.
Healy, Kieran. 2018. Data Visualization: A Practical Introduction. Princeton: Princeton University Press.