Mapping US gun murders at a micro level: new data zooms in on violence – Aliza Aufrichtig on the Guardian US interactive team Monday 20 March 2017 15.11 EDT


The Guardian is releasing a new set of nationwide data for 2015, which can be used to do analysis of how gun murder clusters within neighborhoods

The Guardian found that half of the United States’ gun murders in 2015 were clustered in 127 cities.
The Guardian found that half of the United States’ gun murders in 2015 were clustered in 127 cities. Photograph: Keith Srakocic/AP

We spend a lot of time talking about which cities see the most gun violence. But analyzing gun violence at the city level is very misleading. Gun violence is much more local than that.

The Guardian is releasing a new set of nationwide data for 2015 that maps gun murders at the micro level – down to the local census tract. You can use this data to do analysis of how gun murder clusters within neighborhoods in your city or state.

Our analysis was possible thanks to the not-for-profit Gun Violence Archive (GVA), which tracks shootings and gun deaths using media reports. This data set includes the latitude and longitude of each shooting incident. We mapped each of these geolocated gun murders to a census tract – which means that there’s a wealth of demographic data connected to each census tract, allowing you to analyze the levels of poverty, educational attainment and other factors in neighborhoods where gun murders happen.

This article contains the data we used to conduct this analysis. We invite you to download this data and use it for further analysis and reporting. If you use this data, please make sure to credit the Gun Violence Archive and the Guardian.

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