Geographic Book

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Remote Sensing and Digital Image Processing (DIP)

Remote sensing is the acquisition of Physical data of an object without touch or contact. Earth observation satellites have been used for many decades in a wide field of applications. With the advancements in sensor technology, earth imaging is now possible at an unprecedented level of detail. Imaging spectrometers and thermal multispectral systems acquire detailed spectroscopic information of physical properties of the earth’s surface. Dynamic processes can now be studied with interferometric systems.

Electromagnetic Radiation (EMR) and Electromagnetic spectrum

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ELECTROMAGNETIC RADIATION Definition: Electromagnetic radiation (EMR) is a form of “energy”, that consists of waves of the electromagnetic (EM) field, propagating through space, carrying electromagnetic radiant energy. Electromagnetic radiation (EMR) is a form of energy that is produced by oscillating electric and magnetic disturbance, or by the movement of electrically charged particles traveling through a […]

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History and development of Remote Sensing

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Remote sensing is the process of obtaining information about an object or area from a distance, typically using aircraft or satellites. The history of remote sensing can be traced back to the early 20th century, when aerial photography was first used for mapping and surveying. During World War II, the use of aerial photography for intelligence purposes became widespread. After the war, commercial and civilian applications of aerial photography began to emerge, including land use planning and natural resource management.

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Image Resolution in Remote Sensing

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• Resolution refers to potential details provided by imagery.• Resolution is defined as a measure of the ability of an optical system of other sensor to distinguish between signals that are spatially near or spectrally similar.• Resolutions should be understood by the analyst in order to extract meaningful biophysical or hybrid information form the remotely

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