GTU Civil Engineering (Semester 5)
Disaster Assessment using Geospatial Techniques
December 2014
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) How can geospatial assessment technique be helpful for minimizing the impact of an earthquake?
7 M
1 (b) Explain the role of GIS and RS in assessing the impact of floods.
7 M

2 (a) Explain basic concept of Metadata? Mention its importance in GIS in detail.
7 M
2 (b) Explain the function of DBMS.
7 M
2 (c) Describe imaging with microwave radar.
7 M

3 (a) Explain different resolutions with their significance.
7 M
3 (b) Explain 'vector data model' and 'raster data model' in GIS?
7 M
3 (c) What do you mean by image enhancement in digital image processing? Write in detail about contrast enhancement.
7 M
3 (d) Explain how adjusting brightness and contrast helps in revealing more details in an image.
7 M

4 (a) Explain Synthetic Aperture Radar (SAR).
7 M
Write a short note
4 (b) i) Graphic representation of GIS data
4 M
4 (b) ii) GPS receivers
3 M
4 (c) Why is it necessary to find out errors of GPS? Explain atmospheric error and Satellite clock error in detail.
7 M
4 (d) Enlist the various spatial and non spatial data that need to be collected for GIS analysis for land slide studies in a hilly area and for damage caused due to floods. Explain how each parameter is helpful in doing the study.
7 M

5 (a) What do you understand by 'map'? Differentiate between topographic and thematic map.
7 M
5 (b) What is Sensor? Describe Air Born and Space Born sensors.
7 M
5 (c) Give a brief idea about GSLV and PSLV.
7 M
5 (d) Explain platforms of remote sensing.
7 M



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