It is estimated that more than eighty percent of governmental functions are associated
with managing information about specific locations or geographic areas. A Geographic
Information System (GIS) is a computer system for the input, editing, storage, maintenance,
management, retrieval, analysis, and output of geographically referenced information.
GIS supports applications such as emergency dispatch, land planning, emergency management
and Homeland Security, property appraisal, civil engineering, natural resource monitoring,
transportation planning, monitoring crime and accidents, public health and environmental
analysis, economic development, census analysis, and many more.