GIS ANALYSISIN

PUBLIC SAFETY

Denise Stuckey GIS Production Manager

The Schneider Corporation

GIS Data

Sites layer Parcels Centerlines Neighborhood boundaries Corporate Limits Police Beats ESZ/ESN boundaries

Types of Analysis with GIS

Hot Spot analysis Incident Mapping Buffering areas for evacuation Sex Offender Registry

Hot Spot Analysis

Definition – areas of concentrated crime

The area has a greater than average number of criminal events or an area where people have a higher than average risk of victimization

Crime Theories

Place Theories Street Theories Neighborhood Theories

Hot Spots - Points

Hot Spots - Linear

Repeat Streets Major thoroughfares face higher

crime risks than side streets Higher concentration of gas stations,

restaurants, convenience stores, and retail businesses

Hot Spots - Linear

Drug Dealers

Hot Spots - Polygons

Gradient maps – imply a continuous gradient of risk within a hot spot.

Incident Mapping

Tracking Crime, accidents, incidents

Buffering Areas

Evacuations

Crime Alert – automated call back system

Evacuations

Chemical Spills Factory Fires

– Plume Modeling

Natural Disasters

Factory Fire

Crime Alert

Amber Alert Suspect in the area

Sex Offender Registries

Megan’s Law Web applications for citizens to find

sex offenders in their communities In-house maps for police to track and

verify location of sex offenders Pierce County, Washington

– 2,100 registered sex offenders and kidnappers

Pierce County, WA

Citizen Website– Able to search ½ mile radius from

specified address to find registered sex offenders

– Output is a map and a detailed list of all sex offenders in the area

Levels of Sex Offenders

Three Levels Level 3 – most like to repeat crime Displays a picture, address and list of

past crimes of the individual

Geographic Map

Sex Offender Report

Sex Offender Registry

Public Use of website– Must be kept current– Police Dept updates map via the internet

Sex Offender Registry

Maps – Updates coming due– Concentrations of sex offenders– Buffer areas where children are known to

be Indiana Law – Sex Offenders cannot live closer

than 1000 feet of a school property– Property line or house?

Sex Offender Registry

Must be absolutely sure the right information is on the website

Must keep it up to date

Conclusion

GIS can help manage Public Safety information

Determine hot spots Determine where concentration of

police forces need to be Determine evacuation routes Access to current Sex Offender

information