Murder with Impunity: Where Killings Go Unsolved

The Post has mapped more than 52,000 homicides in major American cities over the past decade and found that across the country, there are areas where murder is common, but arrests are rare.

This is an amazing piece of data journalism. My hometown, Baltimore, never fares well on maps like this :/

Leaving aside the content itself (which stands on its own!), the thing I find particularly interesting about the visualizations is that they are maps of rates. This is an underutilized view of the data—companies frequently plot sales by geography on a map, but almost never do the same thing for conversion rate by geography.


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