Chapter-4:Spatial Information Technology
Exercises
1 . Choose the right answer from the four alternatives given below :
(i) The spatial data are characterised by the following forms of appearance :
(a) Positional (b) Linear
(c) Areal (d) All the above forms
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(ii) Which one of the following operations requires analysis module software?
(a) Data storage (b) Data display
(c) Data output (d) Buffering
Answer:
(iii) Which one of the following is disadvantage of Raster data format ?
(a) Simple data structure
(b) Easy and efficient overlaying
(c) Compatible with remote sensing imagery
(d) Difficult network analysis
Answer:
(iv) Which one of the following is an advantage of Vector data format ?
(a) Complex data structure
(b) Difficult overlay operations
(c) Lack of compatibility with remote sensing data
(d) Compact data structure
Answer:
(v) Urban change detection is effectively undertaken in GIS core using:
(a) Overlay operations
(b) Proximity analysis
(c) Network analysis
(d) Buffering
Answer:
2. Answer the following questions in about 30 words :
(i) Differentiate between raster and vector data models.
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(ii) What is an overlay analysis?
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(iii) What are the advantages of GIS over manual methods?
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(iv) What are important components of GIS?
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(v) What are different ways in which spatial data is built in GIS core?
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(vi) What is Spatial Information Technology?
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3. Answer the following questions in about 125 words :
(i) Discuss raster and vector data formats. Give example.
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(ii) Write an explanatory account of the sequence of activities involved in GIS
related work.
Answer: