Multiple choice

Nowadays satellite-based remote sensing 'multi-spectral imaging' is used. What is the advantage of multi-spectral imaging?

  1. It covers a larger area.

  2. The resolution of the captured area improves.

  3. Identification of various features gets easier.

  4. Signal transmission gets improved.
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C Correct answer
Explanation

Multi-spectral imaging means simultaneous imaging of the earth's surface in more than one wavelength, both visible and invisible, to bring out a lot of latent information which is not available in ordinary photographs. Multi-spectral cameras used in remote sensing usually take four to six photographs at the same time of the same area using different filters. The use of filters helps in identification of different rocks, soils, vegetations, water and other features of the earth's surface, which is not possible otherwise.

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