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IGD411S - INTRODUCTION TO GEOSPATIAL DATA - 2ND OPP - JULY 2023 |
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r
nAm I BIA u n IVERS ITY
OF SCIEnCE TECHn OLOGY
FACULTY OF ENGINEERING AND THE BUILT ENVIRONMENT
DEPARTMENT OF LAND AND SPATIAL SCIENCES
QUALIFICATION: BACHELOR OF NATURAL RESOURCEMANAGEMENT (NATURE CONSERVATION),
BACHELOR OF GEOINFORMATION TECHNOLOGY, BACHELOR OF LAND ADMINISTRATION, BACHELOR OF
PROPERTY STUDIES HONOURS, BACHELOR OF REGIONAL AND RURAL DEVELOPMENT, BACHELOR OF
TOWN AND REGIONAL PLANNING, DIPLOMA IN PROPERTYSTUDIES
QUALIFICATION CODE: 07BNRS, 07BGEI,
07BLAM, 08BPRS, 08BOPS, 07BRAR, LEVEL:4
07BTAR, 06DIPS, 06DPRS
COURSE: INTRODUCTION TO
GEOSPATIAL DATA
COURSECODE: IGD411S
SESSION: JULY 2023
PAPER:
THEORY
DURATION: 2 HOURS
MARKS:
80
SECOND OPPORTUNITY/ SUPPLEMENTARY EXAMINATION QUESTION PAPER
EXAMINER: Ms D. Husselmann
MODERATOR: Mr E. Naoseb
THIS QUESTION PAPERCONSISTSOF 6 PAGES(Including this front page)
INSTRUCTIONS
1. Answer ALL the questions.
2. Write clearly and neatly.
3. Number the answers clearly.
4. Answers to calculations must be rounded off to three decimal places, excluding
answers to co-ordinate conversions
PERMISSIBLEMATERIALS
1. Examination paper.
2. Examination script.
3. Calculators and other drawing equipment.
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Introduction to Geospatial Data
Question 1
IGD411S
Select only the letter considered to be the correct answer.
1.1. The systems of lines used to locate a certain place on earth are called ....
(1)
a. Co-ordinate systems
b. Latitude systems
c. Grid systems
d. None of the above
1.2. Which reference line passes through both the geographic North Pole and the geographic
South Pole?
(1)
a. o·latitude
b. 0 • longitude
c. Tropic of Cancer (23.5°N)
d. None of the above
1.3. lsolines are ...
(1)
a. Lines of equal quantity
b. lines that connect icebergs of equal height
c. lines that show the level of rainfall
d. None of the above
1.4. Which of these form part of the marginal information of a map?
(1)
a. Meridians
b. Contour lines
c. Namibian boundary
d. None of the above
1.5. Satellite images are obtained by ...
(1)
a. satellites in space
b. sensors on satellites in space
c. cameras on satellites in space
d. none of the above
1.6. The concept of map series allows for ...
a. Having a larger scale, allowing more detail to be shown
b. Having a larger scale, allowing less detail to be shown
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Introduction to Geospatial Data
c. Having a smaller scale, allowing more detail to be shown
d. None of the above
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1.7. Ortho photographs are ...
(1)
a. Aerial Photographs that are generalised
b. Photographs that are used by orthopaedic sergeons to plan surgery
c. Aerial photographs that have been geometrically corrected
d. None of the above
1.8. The process of studying and gathering the information required in identifying the various
cultural and natural features on an aerial photograph is called ...
(1)
a. photo inferring
b. photo sensing
c. photo interpretation
d. none of the above
1.9. DGPSstands for?
(1)
a. Direct GPS
b. Differential GPS
C. Drone GPS
d. None of the above
1.10. The art and science of making maps is called
(1)
a. cartogrammetry
b. maping art
c. Photogrammetry
d. None of the above
[10]
Question 2
2.1. What are the three characteristics of geospatial data?
(3)
2.2. What do we call the following:
(3)
a.
The true shape of the eath
b.
Mathematical formulaes used to convert the three-dimensional shape of the earth to
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Introduction to Geospatial Data
a two dimensional flat surface
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c.
The pattern of Meridians and parallels on the earth
2.3. Calculate the distance from 17.568° S to 29.304° S.
(3)
2.4. Select the correct bold word in the statement.
(2)
a.
Different land uses on a map can be identified as Qualitative/ Quantitative data.
b.
A vector/ raster data model makes use of pixels to display geospatial data.
[11]
Question 3
3.1. Convert the following Degrees Minutes and Seconds to Decimal Degrees. Show your work.
(6)
a.
22° 28' 13" S 23° 08' 15" E
b.
24° 55' 04" s
19° 26' 37" E
3.2. Calculate the Great Circle Distance between the two points given in question 3.1 above.
(10)
3.3. You have just finished surveying the NUSTcar parking and you want to determine the scale of
your work. An old city map at scale 1: 500 covering part of the car park already exists. If the
length of one parking bay measures 25mm on your map and the same length on the city map
measures 75mm, determine the scale of the new map?
(2)
[17]
Question 4
4.1 List the five properties which can be distorted depending on the map projection used.
(5)
4.2 Differentiate between index contour lines and intermediate contour lines.
(2)
4.3 Given two scales, 1:50 000 and 1: 250 000, identify the larger scale.
(1)
4.4 What is the magnetic declination?
(1)
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Introduction to Geospatial Data
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4.5 The following points are given to you by a City of Windhoek Town Planner requiring
information about the slope of the area.
Point
Y
X
Height
A
-1340.280
+4901.219
1607
B
-1208.643
+5394.320
1718
Calculate the slope from A to Bas a:
(3)
a.
Percentage
b.
Ratio
(1)
C.
Angle
(2)
[16]
Question 5
5.1 Name two different types of aerial photographs.
(2)
5.2 Name three types of displacement associated with aerial photographs.
(3)
5.3 Select the correct bold answer.
(4)
a. An aerial photograph/ satellite image covers a larger area.
b. An aerial photograph/ satellite image requires planning before ir can be acquired.
c. An aerial photography/ satellite image has a larger scale.
d. An aerial photograph / satellite image contains information reocorded from energy
in othere parts of the electromagnetic spectrum.
5.4 Calculate the scale of a photograph covering Rehoboth taken at a flying height of 2000 m
using an aerial camera with a focal length of 135 mm. Round your scale off to the nearest
1000 place.
(3)
[12]
Question 6
6.1 Name and describe the three components that make up a GPSsystem.
(6)
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Introduction to Geospatial Data
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6.2 Name two different types of GPSpositioning modes. State which one is the least accurate
right next to its name.
(3)
6.3 State one word that define the basis of GPS.
(1)
6.4 Draw two pictures; one showing good satellite geometry and one showing bad satellite
geometry.
(4)
[14]
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