Transcription of Chapter 7 84 Introduction To Remote Sensing
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Chapter 7 84 Introduction To Remote Sensing
84 Practical Work in GeographyChapter 7 Introduction To RemoteSensingYou have read about aerial photography in Chapter 6. If you havecarefully gone through its contents, you would have appreciatedthat it is an extension of the observation and recording capabilitiesof the human eyes. You may also have noticed that the photographicsystem utilises the same principles of observation and recording theobjects of the earth s surface, as being done by the eyes. However,both the human eyes and the photographic systems respond to lightin a minute portion of the total energy received and responded bythe objects surface. The present day Remote Sensing devices, on theother hand, react to much wider range of radiations reflected/emitted,absorbed and transmitted by all object surfaces at a temperature above0 Kelvin (-273 C).The term Remote Sensing was first used in the early 1960s. Later,it was defined as the total processes used to acquire and measure theinformation of some property of objects and phenomena by arecording device (sensor) that is not in physical contact with theobjects and phenomena in study.
Introduction To Remote Sensing of photographic cameras in Chapter 6. In the present chapter, we will confine ourselves to describe the non–photographic sensors that are used in satellite remote sensing. Multispectral Scanners: In satellite remote sensing, the Multi Spectral Scanners (MSS) are used as sensors. These sensors are designed
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