GIS ANALYSIS IN 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