JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III GEOINFORMATICS Previous Question Paper (February - 2023 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is meant by Focal length of lens in aerial photography?
Answer
The focal length of an aerial camera lens is the distance measured along the optical axis from the rear nodal point of the lens to the plane of the film or the focal plane where the image is formed. It is a fundamental parameter that determines the scale of the photograph and the field of view.
Why is stereo photogrammetry important?
Answer
Stereo photogrammetry is essential because it enables the extraction of three-dimensional information from two-dimensional overlapping aerial photographs. By viewing two images of the same area taken from different positions, the human brain or digital software perceives depth, allowing for:
- Accurate measurement of terrain elevation and height of objects.
- Creation of Digital Elevation Models (DEMs) and contour maps.
- Precise mapping of complex topographic features that cannot be determined from a single flat image.
Write down principle of remote sensing.
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What is sensor in geology?
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What do you understand by image histogram?
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Is image classification supervised or unsupervised?
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List few urban applications of GIS.
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What is the definition of error in GIS?
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How do you explain GNSS?
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Which countries use GLONASS?
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Part B
Discuss about various types of Aerial Photogrammetric techniques.
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What are the factors effecting aerial photographs?
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What are the advantages of digital photogrammetry?
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How can you interpret the aerial photographs? Discuss.
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List and explain any two satellites and write down characteristics of satellites.
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What are Spectral reflectance curves? Discuss them for water, vegetation and borewell.
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What are the main characteristics of satellite imageries? Explain.
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Discuss the file formats used in various satellites.
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Explain the applications of remote sensing in ground water prospects and potential recharge zones.
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What are the data types in GIS? Explain with clear illustrations the concepts of various data models used in GIS.
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Discuss in brief various applications of GIS in civil engineering.
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What do you understand by spatial data and how are they integrated to make a GIS?
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Explain in brief how GPS helps in modern life.
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Discuss in brief about GPS satellite signals and also explain its importance.
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Discuss about composition of GPS satellite signals.
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What is differential GPS used for? Discuss the principle of differential GPS.
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