In my last post, I compiled and cleaned publicly available data on over 4.5 million stops over the past 11 years.
I also presented preliminary summary statistics showing that blacks had been consistently stopped 3-6 times more than whites over the last decade in NYC.
Since the last post, I managed to clean and reformat the coordinates marking the location of the stops. While I compiled data from 2003-2014, coordinates were available for year 2004 and years 2007-2014. All the code can be found in my GitHub repository.
My goals were to:
- See if blacks and whites were being stopped at the same locations
- Identify areas with especially high amounts of stops and see how these areas changed over time.
Killing two birds with one stone, I made density plots to identify areas with high and low stop densities. Snapshots were taken in 2 year intervals from 2007-2013. Stops of whites are indicated in red contour lines and stops of blacks are indicated in blue shades.