Final answer:
Alvin is creating crime maps, which are specialized GIS outputs displaying potential crime hot spots and data relevant to law enforcement for proactively addressing criminal activity.
Step-by-step explanation:
Alvin, who works for police services and creates computer-generated images to display potential crime hot spots, is responsible for building crime maps. Crime mapping is a process that involves the collection of electronic crime data allowing law enforcement agencies to plot each instance of crime digitally on a map with sophisticated Geographic Information Systems (GIS). These maps include data on demographics, businesses, institutions, known offenders, and landscape elements, enabling the identification of regions with higher crime frequencies known as 'hot spots.'
Hot spot analysis is a specific technique used within GIS that utilizes buffer zones around crime occurrences to create a progressively color-coded pixel grid map. This method helps to visualize clusters of criminal activity and can incorporate additional information like addresses of known felons, repeat offenders, and establishments that might be related to crime. Advanced forms of crime mapping can use techniques like Rossmo's Formula, aiding in geographic profiling to predict future crime locations and offender behavior patters.