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 from 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 sattellites and other aircraft's. Different schools of thought have different and varied definitions for geographic information system ( GIS). Tomlin defines a GIS as a configuration of computer and hardware and software specially designed for the acquisitions, 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 reference data.
No comments:
Post a Comment