GEOGRAPHIC INFORMATION SYSTEM
BASIC COMPONENTS OF GIS
Fig 4.4 Components of GIS
Geographic information systems have three important components they are
(i) Computer hardware
(ii) Set of application software modules.
(iii) And a proper organizational contest.
Fig 4.5 Components of GIS
1 HARDWARE COMPONENTS OF A GIS
The general hardware components of a GIS are shown in the figure
CPU -Central processing unit is linked to disk drive, which provides space for storing data and programs.
Digitizer -It is a device used to convert data from maps and documents into digital form (Raster to Vector).
Plotter -Plotter is used to present the results of the data processing on a paper.
Tape drive -It is used to store data or programs on magnetic tape for communicating with other systems.
VDU (Visual Display Unit)-It is used to control the computer and the otherperipherals. It is otherwise known as terminal or workstation.