A geographic information system (GIS) is a computer mapping system capable of assembling, storing, manipulating, and displaying geographically referenced information (i.e. spatial data). Local governments (Counties/Cities) typically involve a variety of agencies including assessors, auditors, engineering, planning,

public works, public safety, recorders, treasurers, and zoning.

These agencies are relying more on GIS technology to plan new land developments, determine tax valuations, maintain real estate land records, manage public works networks, route emergency vehicles, analyze crime and accident patterns, manage transportation systems and study environmental issues.