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Michael Schettler

Hi Kaiser;
The chart buries the lede.
I think the untold story in this data is that the majority of the US population falls in the dark blue section - people of colour under-represented on their local police forces. The "cities" in the light blue zone mostly consist of small towns and cities that one has never heard of.
Maybe a scaled bubble chart with some arbitrary (higher) absolute population cut-off, or if we want to know we could compare three charts, Small, Medium and Large populations.

Jack Hughes

I think Michael raises a good point that I read as "are the percentages significant for all data points?". However, the Vis uses the term cities, rather than towns, which would imply a higher minimum population to be included.


Michael: I do think the histogram view might highlight their lede more.

As to whether to use cities or populations as the unit of analysis, it's an analyst's choice. If you choose populations, then you might as well forget about the majority of smaller cities and towns because they won't matter in the scheme of things. This is exactly the same issue as using a standard map or a cartogram. The Washington Post is doing the same thing that the New York Times did in the tile map.

Bubble charts are difficult things. I suspect that you will have a lot of trouble because the large bubbles will overwhelm the little ones. You'd have to sketch it to see though.

Chris Pudney

Here are the data:


I created a new viz with a few changes:


Size of dots correspond to total city population.
Slider along top to filter city size.
Clickable list of cities to highlight selected city.

(thanks for the link to the data, Chris - I was getting it from census.gov!)

Michael Schettler

Hi qning;
Beautiful interactive chart. I had to slide down to about 380,000 population to find the first blue point, Atlanta Georgia (I assume that this is Metro Atlanta). At this population level there are more than 40 orange points.
Said differently, there are NO cities above 385,000 where the police are less white than the population. Pretty powerful conclusion.

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