A retrospective of 15 years of data visualization projects
October 24th, 2024
4 min
Datawrapper lets you show your data as beautiful charts, maps or tables with a few clicks. Find out more about all the available visualization types.
Our mission is to help everyone communicate with data - from newsrooms to global enterprises, non-profits or public service.
We want to enable everyone to create beautiful charts, maps, and tables. New to data visualization? Or do you have specific questions about us? You'll find all the answers here.
Data vis best practices, news, and examples
250+ articles that explain how to use Datawrapper
Answers to common questions
An exchange place for Datawrapper visualizations
Attend and watch how to use Datawrapper best
Learn about available positions on our team
Our latest small and big improvements
Build your integration with Datawrapper's API
Get in touch with us – we're happy to help
This article is brought to you by Datawrapper, a data visualization tool for creating charts, maps, and tables. Learn more.
“Explore your information at multiple levels of depth and breadth,” data vis designer & journalist Alberto Cairo writes in his book “The Truthful Art” (p94). The Data Vis Book Club discussed this book yesterday. So for this week’s Weekly Chart, it’s just appropriate to design a chart that takes his statement by heart:
We can read a few things out of this chart. First, we learn how much energy different countries consume.[1] But this information is mostly there to compare it to the energy consumption of the IT sector worldwide. To explain what this sector contains, it’s subdivided into four parts:
Let’s go back to the first idea: “Explore your information at multiple levels of depth and breadth.”
First, the depth. Alberto didn’t name his book “The Truthful Art” for nothing: He talks a lot about how we can make our charts truer. To do so, we should think about how to reveal the complexity of the data and the uncertainty in it, e.g. with error bars.
It’s inconvenient to add error bars to a stacked bar chart – but we can just add multiple bars. We communicate two important ideas when we show the three estimates the researchers calculated instead of just the estimate for the “expected case”:
First, that we’re uncertain about the numbers (so be skeptical about them, too, dear reader).
Second, how uncertain we are. The IT sector in 2015 might have consumed two times as much energy as Russia, or three times. We don’t know: The range between estimates is huge. (Which makes it even more important to show them!)
So we add depth through visualizing the different estimates and the subparts of the IT sector. Another option to add depth is to show the data over time or for different countries.
And the breadth? We can introduce it by setting our estimates in a bigger context: How much are 2000 to 2500 terawatt hours of energy consumption, really? Turns out: a lot. Country-level-lot. Big-country-level-lot. Only now we can imagine what so much electricity means.
Adding both breadth and depth to our data will make our charts more useful to our readers. As always, you can hover over the chart above and click on “Edit this chart” in the top-right to see how I created it. Also, follow @datavisclub if you want to hear about other data vis books we’ll read. I’ll see you next week!
Wikipedia has you covered in case you’re looking for energy consumption per capita.↩︎
Comments