The Atlantic Cities has a piece about ten interesting maps from 2012. Year in Review: 2012's Year in Maps The map below is just one of them.
"Mayor Bloomberg's insistent support for the NYPD's Stop and Frisk policy has been the single most contentious policy of his tenure, and WNYC's illustration of where the stops occur makes clear why. For one thing, it gives a geographic base to the racially biased search data. As I wrote in August, the mix of those subjected to the humiliating procedure sometimes varies from population data by a factor of nine: "last year, black and Hispanic men between the ages of 14 and 24 accounted for 41.6 percent of stops, though they make up only 4.7 percent of the city's population." According to the same ACLU report from which that data comes, "the number of stops of young black men exceeded the entire city population of young black men (168,126 as compared to 158,406)."
Most importantly, though, the map shows that blocks with large numbers of searches don't yield more guns than blocks with fewer searches."