|At its core, GIS is the
combination of graphical maps with tabular information (such
as databases). It provides a tool to assist with solving
real-world problems. This tool allows visualization and
analysis of spatial information in ways
not previously possible. Databases do not lend themselves to visual
interpretation like maps do. But with relatively simple
GIS operations a user can transform a database into a
picture that is easy to interpret at a glance. For
example: A tabular listing of businesses sorted by address could
have 10,000 entries.Looking at it might not be very useful.
But by plotting their locations on a map and color coding by
business classes, you can instantly tell if there is a
restaurant near you.