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Geo 111: Introduction To Remote Sensing And Gis Question Paper

Geo 111: Introduction To Remote Sensing And Gis

Course:Bachelor Of Education

Institution: Rongo University question papers

Exam Year:2015

QUESTION ONE
a)What do you understand by the term Geographic Information System (GIS) and why it is described as an integrated technology (4mks)

b)Explain the main difference between Passive and Active Remote sensing (2mks)

c)What is the relationship between remote sensing and GIS(4mks)

d)Explain 3 major platforms that are normally used in remote sensing (3mks)

e)What is an electromagnetic spectrum and how it is important to remote sensing (3mks)

f)Name and explain three data types that are normally used in GIS(3mks)

g)Clearly explain how you would go about setting a GIS lab in your institution (6mks)

QUESTION TWO

a)Explain three main characteristics of an electromagnetic spectrum (3mks)

b)Assuming the speed of light to be 3x10⁸ m/s.If the frequency of electromagnetic radiation is 600,000GHz (GHz=10⁹m/s).What is the wavelength of the radiation in micrometre(3mks)

c)Describe the main components which make up a GIS, clearly explaining the importance of each component(5mks)

d)Explain FOUR sources of data for GIS(2mks)

e)Define the term Spectral Reflectance and explain its importance in remote sensing (2mks)

QUESTION THREE(15mks)
a)At the moment there are a number of GIS softwares in the market, some commercial and others Open source. Name THREE commercial and THREE Open Source GIS software, clearly explaining areas where they are used (6mks)

b)Explain FOUR advantages and FOUR disadvantages of using remote sensing (4mks)

c)Summarize some SIX main impediments of a GIS (3mks)

d)Most remote sensing systems avoid detecting and recording waves in the ultraviolet and blue portion of the electromagnetic spectrum.Explain why this would be the case(2mks)

QUESTION FOUR(15mks)
a)Before radiation used for remote sensing reaches the earth surface, it has to travel a very long distance through the atmosphere. During this journey bthe radiation may be scattered or absorbed.Explain THREE major types of scattering and THREE types of absorption clearly stating the circumstances that lead to their occurrences (6mks)

b)Explain FOUR main advantages of using GIS technology(4mks)

c)GIS is now used extensively in a number of areas.Name FOUR such areas of application in the following sectors (4mks)
1.Natural Resources Management
2.Facility Management
3.Land Management
4.Street-networks

d)Explain the meaning of the term Atmospheric windows giving TWO examples (1mk)

QUESTION FIVE(15mks)
a)Clearly explain how you would apply remote sensing in the following areas(6mks)

1.Agricultural production
2.Forest management
3.Hydrology

b)Radiations reflected from the earth surface may be detected and recorded photographically or electronically. Explain the main difference between the two systems giving THREE advantages of each system(3mks)

c)Describe the main Historical developments in the field of remote sensing since the earliest time(6mks)

Geo 111: Introduction To Remote Sensing And Gis Question Paper

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