Showing posts with label crime. Show all posts
Showing posts with label crime. Show all posts

Wednesday, March 21, 2012

What is a safe neighborhood? How to use crime-mapping correctly

Once a week or so, I publish a report by RAIDS, an online tracking system used by Durham, that keeps track of all crime taking place within a one-mile radius of Ninth Street Shopping District. The latest of these reports, for example, shows that 29 criminal incidents took place in the area in the past 10 days. On the first brush, this sounds like a lot and, indeed, the RAIDS map of Durham shows our neighborhood in the shades of reddish yellow, which tends to indicate higher than normal crime rate.

Yet these statistics can be highly misleading. As good folks at Trulia have recently posted, just looking at the heat map of crimes tells you little about the relative safety of the area. The real question is not how much crime -- which is often dependent on the amount of commercial activity in the area -- but what kind 
of crime. When viewed through this lens, our area is a far cry from a criminal hotbed.

To illustrate, let's first take a look at the typical crime map of Durham's crime centered around Ninth Street. I took this data from Trulia Local

Looks bad, right? The red and the yellow colors denote high incidence of crime. But a surprising thing may jump out: Trinity Park, among the most affluent neighborhoods in Durham, is almost entirely colored in reddish/yellowish colors. But is this right? Most locals would argue that the area surrounding East Campus of Duke is fairly safe, a province of palatial homes of Duke faculty and expensive student housing. Indeed, when parsing through the data, one discovers that almost all of the incidents are related to partying as opposed to assaults. Similarly, the dark red areas enveloping Ninth Street Shopping District is theft related, which is unsurprising given the high volume of commercial activity going on there.

Now, let's take a look at the same map now showing the ratio of violent-to-nonviolent crimes. Here, we count crimes such as shootings and assaults as “violent” while petty crimes such as vandalism or theft are “nonviolent.”


Not much going on, particularly when compared to South-East and Central Durham which has seen an unfortunate rash of violence in the past year. 






To make comparison even more explicit, let's see a side-by-side of typical crime map of the two areas:

East Durham Crime Map
Although the East Durham map is redder, it is not dramatically different in color saturation. But what a contrast when the ratios of violent vs. non-violent crime are taking into account. As shown above, this ratio presents a far more  accurate picture of safety in an urban neighborhood.

Trinity Park Crime Map
As with most things in life, the simple and most "common sense" impressions are often wrong or incomplete. Just as one does not compare apples and oranges, one should not simply compare the crime level of a generic car-oriented suburban neighborhood to its urban counterpart. Instead, it is  
    imperative to look at what crime takes place and 
    whether this crime is an inherent outgrowth of 
    proximity to commerce or an indication of  
   something more sinister. 





Sunday, February 26, 2012

Weekly Neighborhood Watch Report (February 17-24)




RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.

Tuesday, February 14, 2012

Weekly Neighborhood Crime Report (February 3-10)


RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.

Tuesday, January 31, 2012

Weekly Neighborhood Watch Report (January 20-27)



RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.

Monday, January 23, 2012

Weekly Neighborhood Crime Report (Jan 13-20)


RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.

Saturday, January 7, 2012

Weekly Neighborhood Watch Report



RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.


Friday, December 30, 2011

Weekly Neighborhood Watch Report (December 16-23)



RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.

Tuesday, December 20, 2011

Revenge of the GPS: local business owners lowjack a car thief


I thought this story about spurned car owners tracking the thief using their car's built-in GPS system was interesting in its own right, but then I noticed that the victims were local business owners of  our local business: Bonnie and Clyde's Scooters, Cycles and Off-Road Motors. Good for you Natalie Didonato and Vincent Sbraccia!

Monday, December 19, 2011

Weekly Neighborhood Watch Report


RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.


Sunday, December 11, 2011

Weekly Neighborhood Watch Report

RAIDS Online is a crime tracking system utilized by the City of Durham to keep track of crime reports throughout the city. One of its best features is a mapping system that allows users to see crime trends by neighborhood or specific address  and easily categorize and hone in on problem areas. Anyone can sign up for free on RAIDS website. After the jump is the full list of all crime that took place within one mile radius of Ninth Street in the past week.