Members Only

How I Made That: National Dot Density Map

Mapping one dot per person, it’s all about putting the pieces together.

The How I Made That series describes the process behind a graphic and includes code and data to work with.

In mapping one dot per person, I used code snippets from a combination of three tutorials. One for Alaska and Hawaii layout, one for dealing with multiple shapefiles, and one for dot placement.

In my final maps, I drew one dot per person and color-coded the dots by race, based on block group-level data from the Census Bureau.

Here’s how I put the pieces together.

To access this full tutorial, you must be a member. (If you are already a member, log in here.)

Get instant access to this tutorial and hundreds more, plus courses, guides, and additional resources, for $39 per month or $129 per year.

Membership

You will get unlimited access to step-by-step visualization courses and tutorials for insight and presentation — all while supporting an independent site. Files and data are included so that you can more easily apply what you learn in your own work.

Learn to make great charts that are beautiful and useful.

Members also recieve a weekly newsletter, The Process. Keep up-to-date on visualization tools, the rules, and the guidelines and how they all work together in practice.

See samples of everything you gain access to:

About the Author

Nathan Yau is a statistician who works primarily with visualization. He earned his PhD in statistics from UCLA, is the author of two best-selling books — Data Points and Visualize This — and runs FlowingData. Introvert. Likes food. Likes beer.