Components

The three main components of a GIS are:

• Computer hardware that includes a computer, network, digitiser, plotter, printer, CD-ROM
  
  
• Sets of applications software which can be divided into five functional groups:
  
  
  • data input and verification
    
  • data storage and database management
    
  • data output and presentation
    
  • data transformation
    
  • interaction with the user
    
    
• A proper organisational context
  

	GIS diagram
Use the two readings to identify how GIS was used in each study and its specific impact in an environmental context. Use the table in your e-journal to record the results. Reading Use of GIS Environmental application Goodchild     Haines-Young et al.