GES512S - GEOGRAPHIC INFORMATION SYSTEMS 1 - 2ND OPP SUPL - JAN 2023


GES512S - GEOGRAPHIC INFORMATION SYSTEMS 1 - 2ND OPP SUPL - JAN 2023



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nAm I BIA un IVERS ITY
OF SCIEnCE Ano TECHno LOGY
FACULTY OF ENGINEERING AND THE BUILT ENVIRONMENT
DEPARTMENT OF LAND AND SPATIAL SCIENCES
QUALIFICATION:
DIPLOMA IN GEOMATICS, BACHELOR OF GEOMATICS, BACHELOR OF GEOINFROMATION
TECHNOLOGY, BACHELOR OF LAND ADMINISTRATION, BACHELOR OF TOWN AND REGIONAL
PLANNING, BACHELOR OF PROPERTYSTUDIES, DIPLOMA IN PROPERTYSTUDIES, BACHELOR OF
REGIONAL & RURAL DEVELOPMENT
QUALIFICATION CODE:
06DGEO, 07BGEO, 07GEI, 07BLAM,
07BTAR,06DPRS,08BPRS,07BRAR
LEVEL: 5
COURSE CODE: GES512S
SESSION: JANUARY 2023
DURATION: 3 HOURS
COURSE NAME: GEOGRAPHIC INFORMATION
SYSTEMS 1
PAPER: THEORY
MARKS: 100
SECOND OPPORTUNITY/ SUPPLEMENTARY EXAMINATION QUESTION PAPER
EXAMINER
MS ROXANNE MURANGI
MODERATOR
MR MIGUEL VALLEJO
INSTRUCTIONS
1. Write your student number on each answer sheet used.
2. Answer ALL the questions.
3. Read each question carefully before attempting to answer.
4. Write clearly and neatly.
5. Materials allowed: non-programmable calculator, Ruler, Pen, Pencil, Eraser.
THIS PAPER CONSISTS OF SIX (6) PAGES (EXCLUDING THIS COVER PAGE)

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GeographicInformation Systems1
Question 1
Define the following terms:
1.1 False easting
1.2 Developable surface
1.3 Vector
1.4 Topology
1.5 Polygon overlay
1.6 Geographic phenomena
1.7 Attribute query
1.8 Geocode
1.9 Cartesian coordinate system
1.10 Geographic analysis
GES512S
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
[20]
Question 2
Geographic Information Systems (GIS) can be used to display spatial data and to solve
problems that involve spatial factors.
2.1 Outline the three purposes of a GIS. Provide an example of each.
(6)
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January 2023

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Geographic Information Systems 1
GES512S
2.2 Explain data analysis and manipulations as one of the functions of a Geographic
Information System (GIS).
(4)
2.3 Geographic phenomena can be categorized in two forms; explain the two types of a
geographic phenomenon and provide two examples of each.
(6)
2.4 Explain the two types of GISconcepts.
(4)
[20)
Question 3
3.1 Outline four uses of a coordinate system.
(4)
3.2 Briefly discuss two properties of equivalent and equidistant map projection. Provide
one example of each map projection.
(6)
3.3 What are UTM zones, and where is the origin of a zone in the southern hemisphere?
(4)
3.4 How are negative coordinates avoided in UTM?
(4)
3.5 Aspects are another way to describe map projections. What is the difference between
oblique and transverse projection?
(2)
[20)
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January 2023

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Geographic Information Systems 1
Question 4
GES512S
4.1 Raster data can be produced using a variety of techniques. Briefly discuss any two
techniques.
(4)
4.2 Name three disadvantages the vector data model has over the raster data model.
(3)
4.3 Different methods of vector-based overlay are possible. Discusspoint-in-polygon overlay
and polygon-in-polygon overlay briefly.
(4)
4.4 What is spatial analysis?
(3)
4.5 List the three concepts of an attribute table.
(3)
4.6 The following attribute table (Figure 1) contains some of the conservation areas found
in the Zambezi Region, stored as conservation areas layer in a GIS. Select geographic
features from the current selection where number of species is less or equals to 3000.
Write down the syntax of your selection query and the conservation areas that meet
the criteria.
(3)
Shape NAMECATEGORTYPE Area_kmN20_SPECIESSP_density
Polygon 'w'uparo Registecroeadnimals
4237 2134 0.503658
Polygon SalambaRlaegistecroealdnimals
6845' 3123 0.456245
Polygon KwanduRegistecroebdirds
2453 9786 3.989400
PolygonMayuni Registecroeadnimafolsre, st 3§67 9999 2.803200
PolygonCap,FivoireFsot recsotnsaenr imafolsr,est 9678 9899 1.022840
Polygon Mashi Emergcionnganimablirsd, s 5685 9786 1.721370
Figure 1
[20]
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January 2023

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Geographic Information Systems 1
Question 5
5.1 List the three types of reports that can be generated in a GIS.
5.2 Examine the map in Figure 2 and determine the type of map.
Average annual temperaures in Namibia
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J4antr.t'ill
Legend
-Border
Temp.nturn In •c
-•16
16-:7
17-18
1S-t4?
19-::D
~:!I
21-12
GES512S
(3)
(1)
I :.500.000
o
1:is ~o
""'km
Figure 2
J.,.1,3pp.'iJd1.•=DpId~
SFB 389-'ACACIA", subproject E1
University or Cologne
E1
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tnpn ....-.do';>~til<Jh"l"fl(~)
5.3 Identify the data type used to indicate the annual temperatures in Namibia in the map
legend of Figure 2.
(1)
5.4 Under which map category would you classify the map in Figure 2? Motivate your
answer.
(3)
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Geographic Information Systems 1
GES512S
5.5 List the map elements found in Figure 2.
(5)
5.6 What are the main classification decisions made during the map production process? (3)
5.7 Data accuracy expresses how closely a set of data represents reality. Identify any four
(4) indicator aspects that can be used to describe accuracy.
(4)
[20]
2nd Opportunity/ Supplementary Exam Question Paper Page 6 of 6
January 2023

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