7/24/2019 Remote Sensing Final Examination Paper

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University of Colombo, Sri LankaInstitute of Human Resource Advancement (IHRA)

Postraduate !i"loma in #eoinformatics (P#!#is)

$ndSemester %&amination ' anuary, $*$

P#!#is*$+ Remote Sensin A""lications

Instruction to the Candidates

1. Create your own folder in C:\exam. Folder name must be your index no.

2. This paper comprises two parts. Part I: Theory section. Answer !Three" out of #$uestions in this section.

. Part II: %ractical section. &ou ha'e to sa'e your all files in the folder you ha'e

created.#. Total number of pa(es

). Time allocated for the examination is three hours !From *.++ am to 12 ++ ,oon"

-. If a pa(e or a part of this $uestion paper is not printed properly please inform the

super'isor immediately./. 0ach $uestion carries e$ual mars

. &our data folder is C:\3456ATA

Part I ' -eory ( * . Hours)

Ans/er t-ree (0) 1uestions only2

1.

a" 7hich part of the 0lectroma(netic 4pectrum is used for 8icrowa'e 3emote

4ensin(9 4pecify the most common 8icrowa'e bands and wa'elen(th ran(es.

b" 3adarsat 2 was launched by Canadian 3emote 4ensin( A(ency. 7hat are thecharacteristics !7a'elen(th Altitude polariation and beam mode types" of

3adar Ima(es from this satellite9 7hat is the hi(hest resolution that can beachie'ed by this satellite ima(es.

c" 7hat are the (eometric distortions that appear in radar ima(es9 0xplain each of

them briefly.

2.

a" 8icrowa'e obser'ation is hi(hly sensiti'e to dielectric properties of ob;ects.

0xplain briefly.

b" An acti'e microwa'e instrument return si(nal is influenced by some systemparameters. 7hat are these system parameters and explain then briefly.

c" If an a(ricultural area with crops such as paddy and corn became flooded what

you thin these areas mi(ht loo lie on a radar ima(e9 0xplain the reasons for

your answers based on your nowled(e of how radar ener(y interacts with thetar(et.

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a" 7hat is data fusion9 7hat are the ad'anta(es of data fusion in 3emote sensin(9

7hat are the types of data fusion9.

b" 7hat you mean by radiometric distortion and what are the causes of the

distortion9 6escribe the ways of correctin( the cosmetic errors.

c" &ou ha'e (i'en a tas to separate twp types of forest within a certain area with the

help of satellite ima(es.

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Part II ' Practical ( * . Hours)

a)2 !ata 3usion

!ata #iven+ ?eo0ye multispectral Ima(es: blu.im( (rn.im( redim( = nir.im(

?eo0ye %anchromatic Ima(e: pan.im(

1. Create a color composite ima(e with # bands.2. Fused the ima(e and create a pan sharpened ima(e with # bands

. 6i(itied the tea area as poly(on shape file and calculate the extent of Tea area in

hectares.

@@@@@@@@@..hectares

b)2 4ultiband Imae Classification for Landuse5Landcover classes

1. 4elect the s"ot2imima(e for multiband ima(e classification.

2. 4elect Unsu"ervised Classification from the Classification menu to perform an

unsuper'ised classification usin( the I46ATA al(orithm.

. 0nter 6 in the 7umber of Classes number field and perform the classification.#. Analye the indi'idual classes and complete the followin( table.

). Calculate the followin( extent from the land use map and complete the table.

Band use Area !ha" %ercenta(e a(ainst the total

area of the ima(e !"

7ater