Making decisions based on geography is basic to human thinking. Where shall we go, what will it be
like, and what shall we do when we get there are applied to the simple event of going to the store or
to the major event of launching a bathysphere into the ocean's depths. By understanding geography
and people's relationship to location, we can make informed decisions about the way we live on our
planet. A geographic information system (GIS) is a technological tool for comprehending geography
and making intelligent decisions.