A
Geographic Information System (GIS)
is a system of computer applications that enables you to create,
view, manipulate and analyze spatial diverse information from
multiple sources in a single location. In most cases, datasets
used in GIS are grouped into categories for easy storage and
use. The data sets that a GIS can support can be divided into
two main parts: Graphical (spatial) information and Tabular
(attribute) information. Spatial data is georeferenced or
location-specific data that is graphically displayed on a
computer screen. All graphic information is called a feature.
Features can be points, lines, and even polygons.