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
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