资料来源 : Free On-Line Dictionary of Computing

Geographic Information System
     
         (GIS) A computer system for capturing, storing,
        checking, integrating, manipulating, analysing and displaying
        data related to positions on the Earth's surface.  Typically,
        a GIS is used for handling maps of one kind or another.  These
        might be represented as several different layers where each
        layer holds data about a particular kind of feature
        (e.g. roads).  Each feature is linked to a position on the
        graphical image of a map.
     
        Layers of data are organised to be studied and to perform
        statistical analysis (i.e. a layer of customer locations could
        include fields for Name, Address, Contact, Number, Area).
        Uses are primarily government related, town planning, local
        authority and public utility management, environmental,
        resource management, engineering, business, marketing, and
        distribution.
     
        {GIS dictionary
        (http://www.geo.ed.ac.uk/root/agidict/html/welcome.html)}.
     
        {(http://www.ncl.ac.uk/~ngraphic/wotzagis.html)}.
     
        (1995-12-21)