Chicago Cannabis Decriminalization

A look into Chicago Police Department’s incident reports for marijuana related arrests.


The chart below displays over 15 years of CPD’s Cannabis related arrests for possession of 30 grams or less. The data is from


Here is the ruby code written to accumulate the monthly totals. Additional data filtering was done on the Socrata website prior to exporting the csv data file. Google Charts was used to create the line chart. CartoDB was used to create the still of the torque map.

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