How a GIS works

The basis of a GIS involves building up a database of different layers of information for the same geographical location which can then be analysed. Data input to a GIS includes:

Three different GIS layers 25kb

Maps

• Digitised information
  
  
• Scanning
  
  
• Remote sensing
  
  
• Downloading
  
  
• Remote access
  

Tables

• Attribute information