PolicyMap is a Geographic Information System (GIS), that offers "custom demographic maps, tables, reports and [an] analysis tool, [...] Available data includes demographics, home sale statistics, health data, mortgage trends, school performance scores, [...] unemployment, crime statistics and city crime rates.
The link below will perform a search in the online catalog (or OPAC, online public access catalog) for books sharing the subject heading of 'geographic information systems.' Some items will be in print, some will be available electronically.
A guide to the mobile versions of library resources, where they are availalble.
Spotlighted applications of GIS include ways that urban planners in India are using it to map traffic flows; how it's being applied in London to plans for projected mass transit use during the 2012 Olympics; how it's being used by disaster response teams to prepare for possible nuclear reactor leaks; and ways that police are using it to track and reduce crime.