Functions of a GIS

Functions of a GIS

1. Performs 6 operations

   • Data capture
     • digitising
     • scanning
     • mosaicing
     • editing
     • generalisation
     • topological cleaning
   • storage
     • compression
       • coding
       • group of same values
     • metadata handling
     • control via macros or languages
     • format support (R/V)
   • management
     • physical model supprot
     • DBMS
     • address matching
     • masking
     • cookie cutting
   • Retrieval
     • locating
     • selecting by attributes
     • buffering
     • map overlay
     • map algebra- prioritise
   • analysis
     • ultimately what defines a GIS
     • interpolation
       • geostatistical
     • optimal path selection
     • geometric tests
       • topology
     • slope calculation
   • display
     • desktop mapping
     • interactive modification of cartographic elements
     • graphic file export

2. purpose

   • decision making
   • policy making
   • representation of large amounts of data
     • public use
     • indication of patterns/ phenomenons