Two Centuries of Population, Animated
You’ve likely seen the population density map of the United States in one form or another. A lot of people per square mile reside in big cities, fewer people reside in suburban areas, and a lot fewer people reside in rural areas. Cities weren’t always cities though. Rural wasn’t always rural. If you look at people per square mile over a couple of centuries, you get a better idea of how the country developed.
The animated map above shows population density by decade, going back to 1790 and up to recent estimates for 2015. The time in between each time period represents a smoothed transition. This is approximate, but it gives a better idea of how the distribution of population changed.
As you watch, keep in mind that the map is based on data that was available and that it only represents the United States population.
This is especially notable during the first century. No data shows in much of the country, the estimates are spotty in many territories, and there were people who lived in the blanked out areas before newcomers settled.
- I used R to generate the maps and FFmpeg to string the images into a video.
- Data are originally from the Census Bureau but made much more accessible by NHGIS.
Become a member. Support an independent site. Improve your visualization skills.Join Today
This is for people interested in the process of creating, designing, and exploring data graphics. Your support goes directly to FlowingData, an independently run site.
What You Get
- Instant access to tutorials on how to make and design data graphics
- Source code and files to use with your own data
- In-depth courses on visualization in R
- Hand-picked links and resources from around the web
How You Will Die
So far we’ve seen when you will die and how other people tend to die. Now let’s put the two together to see how and when you will die, given your sex, race, and age.
People get married at various ages, but there are definite trends that vary across demographic groups. What do these trends look like?
Top Brewery Road Trip, Routed Algorithmically
There are a lot of great craft breweries in the United States, but there is only so much time. This is the computed best way to get to the top rated breweries and how to maximize the beer tasting experience. Every journey begins with a single sip.