Write a brief note on remote sensing and GIS.

Write a brief note on remote sensing and GIS.

Ans.   Remote Sensing and GIS – Remote sensing is the science of deriving information about the earth’s land water areas form images acquired by using sensing devices operated from a remote location. It relies upon measurement of electromagnetic energy reflected or emitted form the features of interest.

The field of GIS and remote sensing has been referred to as the technology of today. The largest primary source of digital data for use in GIS is undoubtedly that created by Remote sensing technology on board of satellites and other aircrafts. Different schools of thought have had different and varies definitions for geographic information system (GIS) . Tomlin defines a GIS as a configuration of computer hardware and software specially designed for the acquisition, maintenance and use of cartographic data. Burrough defines a GIS as a powerful set of tools for collecting storing and retrieving at will, transforming and displaying spatial data from the real world.

Thus, a GIS is a computer-assisted system for the acquisition, storage, analysis and display of geographically are spatially referenced data.

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