Category Archives: Chicago Data

The Spread of ShotSpotter in Chicago 2017 – 2022

ShotSpotter is gunshot detection technology that uses sophisticated acoustic sensors to detect, locate and alert law enforcement agencies and security personnel about illegal gunfire incidents in real-time. ShotSpotter uses acoustic sensors that are strategically placed in an array of approximately 20 sensors per square mile. These sensors are connected wirelessly to ShotSpotter’s centralized, cloud-based application to reliably detect and accurately triangulate gunshots.

Data is from CARTO was used to create animated map of ShotSpotter alerts.


Chicago ShotSpotter coverage as of 7/17/2022

Chicago Victims of Homicides and Non-Fatal Shootings 2010 – 2022

A look into Chicago’s individual-level homicide and non-fatal shooting victimizations. The dataset was published on the Chicago Data Portal and comes from the Chicago Police Department (CPD). Accessed 7/4/2022. Click on larger visualizations for full size. Carto and Google Charts were used.

12 years of shootings..

Victims by race..

Daily Counts

Aggregates by Month, Day of Week, and Hour of Day. 2010 – 2022..
Summer months accrue the most shootings. Suns out guns out.

Most shootings happen over the weekends.

Night time is the most popular time for a shooting.

Age Group..




126,241 Heroin Arrests Visualized, Chicago 2001 – 2020

A look into heroin related arrests spanning almost 2 decades. The data is collected by the Chicago Police Department and available at Chicago Data Portal – Public Safety section. Click on static maps below to enlarge and/or play animation.

Full city map of all incidents.

West Side of Chicago. Heroin enforcement in the west side is so dense that city blocks are fully illuminated by incident reports.

South Side of Chicago (2133x2917px).

Over the last two decades CPD’s enforcement of heroin has gone down.

Map of Chicago created by Traffic Crashes 2016 – 2018

Point and heat maps of Chicago created by plotting coordinates of traffic crashes. Time range used, spans from January 2016 through September 2018. The data can be found at

Crash data shows information about each traffic crash on city streets within the City of Chicago limits and under the jurisdiction of Chicago Police Department (CPD).

Click on map images below to enlarge.