Remote Sensing - Advanced topics in Geology - Geology & Geophysics Previous Year Questions

1

2010 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2010

The spatial resolution of IRS LISS-III multi-spectral sensor for Near Infra-Red (NIR) band is

A

5.8 m x 5.8 m

B

23.5 m x 23.5 m

C

70 m x 70 m

D

72.5 m x 72.5 m

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2

2012 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2012

Identify the type of fault present in the given aerial photograph.

A

Normal fault

B

Reverse fault

C

Left-lateral strike-slip fault

D

Right-lateral strike-slip fault

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3

2012 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2012

A major thrust in the Himalayas has resulted in intense shearing of a zone about 0.5 km wide on either side of the thrust leading to landslides. Which GIS function can be used to display the shear zone?

A

Contiguity (adjacency)

B

Spread

C

Proximity (buffer)

D

Search

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4

2014 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2014

Drainage patterns observed in four areas are shown in black-and-white panchromatic images P, Q, R and S. Field work in these areas has indicated presence of the following lithology/geological unit. 1. Fractured quartzite 2. Shale 3. Limestone 4. Alluvial plain The correct match of the drainage patterns with the lithology/geological unit is

A

P-1; Q-2; R-4; S-3

B

P-4; Q-1; R-3; S-2

C

P-4; Q-1; R-2; S-3

D

P-2; Q-1; R-3; S-4

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5

2016 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2016

Clay minerals and Fe-oxide minerals, products of hydrothermal alteration and supergene oxidation, are good indicators of mineralization. Choose the CORRECT Thematic Mapper (TM) band ratio images for detection of these minerals.

A

band ratio 5/7 for clay and 3/1 for Fe-oxide minerals

B

band ratio 3/1 for clay and 5/7 for Fe-oxide minerals

C

band ratio 3/7 for clay and 5/1 for Fe-oxide minerals

D

band ratio 5/1 for clay and 3/7 for Fe-oxide minerals

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6

2025 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2025 [Session 1]

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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7

2017 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2017

In a vertical aerial photo, the top and bottom of a tower built on a flat terrain is displaced by 2 mm. In the photograph, the distance between top of the tower and nadir point is 100 mm. The flying height of the aircraft was 3000 m above the ground. The estimated height of the tower is __________ m.

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8

2018 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2018

A sun synchronous satellite is at an altitude of 300 km and the spectrometer makes an angular coverage angle of 12°. The Swath (GFOV) of the satellite is ________ km.

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9

2019 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2019

The figure given below represents a scatter plot of Digital Numbers (DN) of Band 4 and Band 5 of a satellite imagery. The fields of Class A and Class B are indicated by the rectangular boxes along with their class means (open circles). Class assignment for the point P by Minimum Distance to Mean (MDM) and Nearest Neighbour (NN) algorithms are ______.

A

Class A by MDM and class B by NN

B

Class A by NN and class B by MDM

C

Class A by both MDM and NN

D

Class B by both MDM and NN

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10

2020 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2020

The scale factor of an aerial photo of a planar ground surface, taken vertically downwards by a camera with a focal length of 300 mm, from a flying height of 3000 m is ______.

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11

2023 · Geology & Geophysics · Advanced topics in Geology · Remote Sensing

Geology & Geophysics (GG) 2023 [Session 1]

A vertical aerial photograph is obtained over flat terrain with a 30 cm focal-length camera lens from an altitude of 18288 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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