Tag Archives: graphics

An image with an impact

If good writing is the foundation on which technical communication is built, then visual elements provide the curb appeal.

Even though most of my training and experience are in writing, not illustrating, I’m keenly aware of the huge effect — for good or ill — that visuals can have on content.

I pay close attention to how the artist chooses to present data in maps and graphs, because that choice can strongly influence the reader’s perception.

I like to spotlight images that are informative and well-executed — like the map in ProPublica’s story on last summer’s Houston floods and the Tampa Bay Times‘ 2015 infographic about the Gulf of Mexico after the Deepwater Horizon oil spill. (Unfortunately, the Times has removed the infographic from its site, but a small piece of it survives in my post.)

Then there’s the recent op-ed by the New York Times‘ Nicholas Kristof on gun violence in the U.S. In an article full of bar graphs and maps, one image in particular made my jaw drop.

Wishing to point up the lack of research into gun violence, compared with research into diseases like cholera and diphtheria, Kristof had a Times artist compare two data points for each problem: number of people affected and number of research projects funded by the National Institutes of Health over the 40 years ending in 2012.

As you scroll down, try to set aside your political views — whether you’re pro- or anti-gun control — and evaluate this image on how effectively it delivers its message.

graph juxtaposing 4 million gun-violence cases and 3 research grants

I’ve seen very few images that delivered their messages so startlingly, so resoundingly. The numbers are impressive, but the huge red circle and the three tiny boxes thunder out the message: gun violence, while a serious threat to public health, is woefully under-researched. (Kristof says that’s because of lobbying by opponents of gun control.)

Feel free to disagree with the message. But don’t tell me that it wasn’t delivered effectively.

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Tell your story, respect your reader

Look at these two maps. They’re based on the same data: population gain or loss by county. But they tell vastly different stories.

In the first map, the graphic artist started with the two extreme values in the data set (-6.3% and +28.7%) and divided the color scale into 5 equal pieces. As a result, all of the counties losing population are lumped together with counties that had no change or that posted slight gains.

usmap1

Source: Pew Charitable Trusts

The map tells us that a lot of counties lost population or held steady, several counties added population, and exactly two (one in the top middle and one near the bottom middle) added a lot of population. Frankly, it’s not much of a story.

Now look at what the Washington Post‘s Christopher Ingraham did with the same data. Ingraham changed the color scheme: blue counties gained population and red counties lost. The color intensity changes for counties that gained or lost more than 1% or 2%.

usmap2.png

Source: Christopher Ingraham, Washington Post

Now you can see a story. Continue reading