Monday, February 23

Quantitative School Bus Stop Risk Assessment of Redlands, California



This was a Major Individual Project for the University of Redlands working with Claiborn Lewis Phillips in 2005.



















The purpose of this Major Individual Project (MIP) was to identify public school bus
stops in the city of Redlands with certain risks. Those risks being violent crimes, drug
related crimes and the homes of convicted sex offenders. The MIP made use of the
Kernel density function along with the Getis-Ord Hotspot function in ESRI’s ArcGIS 9.1
software. These functions were both used alone and combined. The Kernel Density
function was used alone to derive a density surface that would be reclassified to produce
a risk surface that would identify the risk of the school bus stops. The Hot Spot Analysis
(Getis-Ord Gi*) with and without (z-score) Rendering were use in combination with the
Kernel Density function. The pairing of these two functions, Kernel density and Hot
Spot Analysis, was utilized to produce surfaces that would act as visual aids to better
identify hot and cold spots. These surfaces were generated by using the Hot Spot
Analysis functions to compute the Getis-Ord Gi* (with and without rendering) values.
Those values were then used as the Population field for the Kernel density function that
produced Hot Spot/Kernel density surface. These results were used to produce maps to
aid police officers, and school officials and produce an IMS site to inform the parents of
the community.

The project paper can be found here...

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