Keeping Residents Informed with Sex Offender Mapping


The Village of Northbrook’s Police and Geographic Information Systems
(GIS) departments have teamed up to provide residents with an
interactive map showing the locations and information of sex offenders
within the Village. The process of updating this information for the
residents is easily done with GIS. The Police Department notifies GIS
when a new offender has registered within the Village and GIS then
gathers and downloads offender information from the Illinois State
Police website. A Microsoft Excel macro was created to expedite the
process of cleaning up and formatting data downloaded from the State’s
website, making the process even faster.

A custom layer showing the offender location is created using the
offender data and displayed on the village’s interactive mapping
application on their community website, called MapOffice™. MapOffice™
is an excellent method for displaying offender information by showing,
not only the offender’s location, but also allowing users to interact
with the map. Users can click on the offender location and open a
pop-up window displaying a variety of information that is provided by
the State Police, including a picture. MapOffice™ delivers a
centralized source for this information that is easily kept up to date.

The use of GIS technology has allowed the Police Department to
continue its commitment to serving residents by providing effective
services, such as the sex offender interactive map, to help keep
residents safe and informed.​