A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earth’s surface.
GIS is used as a technique to assemble, supervise and scrutinize the data and utilizing them in creating a 3D model of it. These help in determining the geographical attributes of an area. Satellites are being used to obtain these data.<u> This system is used to construct large and small scale maps. It shows how changes take place in a particular area with a gradual increase in time. </u>
