Geology and Geophysics
GATE GG-1 topic:basic-principles-remote-sensing PYQs
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How to practice topic:basic-principles-remote-sensing
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 20. Imported answers require independent review unless marked reviewed.
Question 57
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In remote sensing, the parameter(s) that can be estimated in the Thermal Infrared region (3 - 14 μm) is/are
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Three pixels P, Q, and R in an image are characterized by the NDVI values of + 0.84, + 0.01, and − 0.89, respectively. Which of the following options is/are correct?
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If the lowest Digital Number (DN) value in an image of 10-bit radiometric resolution is 0, then the maximum DN value of that image is __________
(Answer in integer)
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 58
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Which of the following statements is/are correct for electromagnetic (EM) radiation?
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A 3×3 image (Image A) has been linearly stretched to get the maximum contrast in an 8-bit display system. Digital Number (DN) values of the pixels in Image A are shown. The value of the pixel marked as ‘?’ in the output Image B after linear stretching is __________.
(Answer in integer)
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The fraction of the incident electromagnetic energy reflected from a material is known as
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The CORECT sequence(s) of electromagnetic radiations in terms of increasing wavelength is/are
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 43
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A vertical aerial photograph is obtained over flat terrain with a 30 cm focal-length camera lens from an altitude of 1828 m. If the width of a dolerite dyke on this vertical photograph is 2 mm, its actual width on the terrain is __________ m. [round off to 2 decimal places]
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In which one of the following regions of the electromagnetic spectrum does the maximum atmosphere scattering occur?
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Which one of the following is the optical spectral window suitable for remote sensing?
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