M.Sc. (Semester II) (CBCS) Examination Nov/Dec-2018
Environmental Science
REMOTE SENSING AND GIS IN ENVIRONMENTAL SCIENCE
Time: 2½ Hours Max. Marks: 70
Instructions: Answer any five questions.
All questions carry equal marks.
Question No. 1 is compulsory.
Attempt any two from Q. No. 3 and 4.
Attempt any two from Q. No. 6 and 7.
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
In the world of GIS another term for the property of connectivity is
Proximity Neighborhood
Topology Boolean identify
The part of radiation due to scattered/diffused entering the field of view of a
remote sensor
Reduces the contrast of the image and also its sharpness
Increases the contrast of the image but reduces the sharpness
Increases both the contrast and sharpness
Reduces the contrast but increases the sharpness
The remote sensing techniques applied for the earth's surface feature is
generally confined to the following wave lengths.
0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 m
2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 m
4.2 to 5.0, 7.0 to 15 m and 1 cm to 30 cm
All of these
The arrangement of terrain features which provides attributes: the shape, size
and texture of objects is called
Spatial variation Temporal variation
Spectral variation None of these
Pick up the correct statement from the following:-
Spatial resolution of the imaging system becomes poorer with increase of
platform height
Platforms may be either stationary or mobile
Area coverage of the imaging system increases with the increase of the
platform altitude
All of the above
Stevens levels of data scaling do NOT include
Ordinal Nominal
Ratio Dasymetric
Examples of continuous fields are
Air temperature Barometric pressure
Soil salinity All of the above
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SLR-VI-291
Vector data represented in the form of
Pixel Point, line and polygon
a and b None of the above
The reflectance from a surface is called specular reflection if is follows
Snell's law Lambert's cosine law
Plankton's law All of these
10) GIS deals with which kind of data
Numeric data Binary data
Complex data Spatial data
11) Which of the following belong to the eight spatial relationships?
Disjoint, meets, equals Inside, covered by
Contains, covers, Overlaps All of these
12) What is metadata?
It is 'data about data' It is 'metrological' data
It is 'Oceanic' data It is 'Contour' data
13) Who coined the term 'Remote Sensing'.
Evelyn L. Pruit a Geographer
Gaspard Felix Tournachon, a French Scientist
Wilbur Wright, an Italian Scientist
None of these
14) The Optical property of a water body depends on
Absorption by the suspended particulate matter
Absorption by the dissolved material
Scattering by the suspended particulate matter
All of the above
Q.2 Describe the advantages and disadvantages of remote sensing. 14
Q.3 Describe various regions of electromagnetic spectrum with the help of suitable
diagram.
14
Q.4 Explain the difference between raster and vector data structure. Mention their
merits and limitations also.
14
Q.5 Write a short note on the following: 14
Concept of Arc, Node and Vertices
Concept and Advantages of Topology
Q.6 Write a brief with suitable illustration on the following:- 14
Fundamental concepts of remote sensing
Differential between cross track and along track scanners.
Q.7 Write an account on the following:- 14
Advantages and disadvantages of Raster data model
Interval and Ratio data