GIS is a computerized technology that uses a geographic information system as an  framework for managing and integrating data. Full form of GIS is Geographic Information System. For more information about GIS please visit : http://www.gis.com/whatisgis

A method to visualize, manipulate, analyze, and display spatial data , also linking a database to the maps in GIS

GIS is a System of computer software, hardware and data, and personnel to manipulate, analyze and provide information that is tied to a spatial location –

• spatial location– usually geographic location
• Information– visualization of analysis of data
• System– linking software, hardware, data

GIS is often associated with maps. A map, represents geographic data in a GIS.

In GIS there is 2 ways to Input and Visualize Data

• Raster – Grid

• pixels
• a location and value
• Satellite images and aerial photos are already in this format

• Vector – Linear

• Points, lines & polygons
• “Features” (house, lake, etc.)
• Attributes
• size, type, length, etc.

Data required for GIS Applications

• Digitized and Scanned Maps
  – purchased, donated, free (Internet)
  – created by user
• Data Bases – Tables of data
• GPS – Global Positioning System for accurate locations
• Remote Sensing

Where GIS is used ?

• Emergency Services – Fire & Police
• Environmental – Monitoring & Modeling
• Business – Site Location, Delivery Systems
• Industry – Transportation, Communication,
  Mining, Pipelines, Healthcare
• Government – Local, State, Federal, Military
• Education – Research, Teaching Tool,

Administration wherever Spatial Data Analysis
is Needed