GTU Civil Engineering (Semester 5)
Disaster Assessment using Geospatial Techniques
May 2015
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) Explain fundamental steps in digital image processing.
7 M
1 (b) Discuss limitation of using GIS in disaster management.
7 M

2 (a) Define data encoding. Explain how data from various data sources are encoded for use in a GIS software.
7 M
2 (b) Write application of remote sensing.
7 M
2 (c) Give an outline how remotely sensed data can be used in GIS software to assess the damage done due to cyclone.
7 M

3 (a) Describe across track scanning and along track scanning systems to produce 2D digital image of the surface briefly.
7 M
3 (b) Describe imaging with microwave radar.
7 M
3 (c) Discuss the concept of active and passive microwave remote sensing. Explain the components of radar as an active microwave remote sensor.
7 M
3 (d) Explain "vector data model" and "raster data model" in GIS?
7 M

4 (a) What is resolution for sensor and pixel in image? Explain in detail spectral resolution and temporal resolution.
7 M
4 (b) Draw a sketch to explain how a remote sensing system works to capture data and transfer it to the user. State the specific practical application of the infra red region of the electromagnetic spectrum.
7 M
4 (c) Explain the function of DBMS.
7 M
4 (d) Why is it necessary to find out errors of GPS? Explain atmospheric error and satellite clock error in detail.
7 M

5 (a) Write briefly the features and objectives of CARTOSAT, METSAT, and Chandrayan.
7 M
5 (b) Explain types of satellite orbits.
7 M
5 (c) Explain basics of relief and rescue operation by disaster assessment.
7 M
5 (d) Write down type of GPS receivers and discuss basic components of generic Receiver.
7 M



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