GGH2603 EXAM PACK
2024
QUESTIONS AND
ANSWERS
FOR ASSISTANCE CONTACT
EMAIL:
, lOMoARcPSD|44660598
Assignment 3 (Portfolio)
Dear Student,
Please type in your answer in the blocks provided. Once you have filled in the blocks, please save
it as a PDF file and submit online. Please DO NOT email us your assignment!
It will not be marked, if sent to us by email you will get ZERO percent (0%) for the assignment.
Declaration: I, Student Name and Student Number, hereby declare that it is my own work using
official material from myUNISA, other sources or the Internet. I did not copy and paste and use
whatsoever other means except my own typing/writing and drawing to do the assignment.
Student Name and Student Number (electronically signed on this day: add date).
The unique number for this portfolio is: 563568
Please note that this is your exam and any irregularities will be dealt with in an appropriate
manner!
, lOMoARcPSD|44660598
QUESTION 1 [30]
Question 1.1: The map below shows a cross-country trail run. You need to calculate the compass
bearings from the start back to the start as indicated by the red arrows. Please use the guide to your
answers given in the table.
VTFGTG6TG6
Magnetic declination for 9 X18
23°06’ + ( 60 )= 23°06’ +2°42’ = 25°48’
2020
(6 marks)
Compass bearing Start to 300°NW
A (2 marks)
Compass bearing A to B 260°NW
(2 marks)
Compass bearing B to C 10°NE
(2 marks)
Compass bearing C to D 300°NW
(2 marks)
, lOMoARcPSD|44660598
Compass bearing D to E 7
(2 marks) °NE
Compass bearing E to C 185°SW
(2 marks)
Compass bearing C to F 160°SE
(2 marks)
Compass bearing F to 180°S
Start (2 marks)
Question 1.2: Use the scale given and calculate the total length of the trail run.
HINT: Use straight line distance between points and multiply with 1,2. (This is known as a crow-flight
conversion to approximate a straight line to a path on the ground). (8 marks)
DISTANCE =310mm
310mm x1.2= 372mm
372mm = 20.7Km
18mm
QUESTION 2 [15]
Given the aerial photograph showing part of Pretoria Central below, answer questions 2.1. to 2.4.
Aerial photograph showing Pretoria Central. Source: University of Pretoria
The average ground elevation at this region in Pretoria is 1320 m and the digital camera used to
capture this aerial photograph was on-board an aircraft flying at 1820 m above mean sea level. The
focal length of the camera lens used is 80 mm.
Hint: Use the corners of the aerial photograph as fiducial marks to determine the principal point.
Printing: Print this page, unchanged, together with the accompanying text using the A4 paper size to
enable you to get the most accurate measurements.
Question 2.1: Calculate the scale of the aerial photograph (5 marks).
Answer for Question 2.1:
2024
QUESTIONS AND
ANSWERS
FOR ASSISTANCE CONTACT
EMAIL:
, lOMoARcPSD|44660598
Assignment 3 (Portfolio)
Dear Student,
Please type in your answer in the blocks provided. Once you have filled in the blocks, please save
it as a PDF file and submit online. Please DO NOT email us your assignment!
It will not be marked, if sent to us by email you will get ZERO percent (0%) for the assignment.
Declaration: I, Student Name and Student Number, hereby declare that it is my own work using
official material from myUNISA, other sources or the Internet. I did not copy and paste and use
whatsoever other means except my own typing/writing and drawing to do the assignment.
Student Name and Student Number (electronically signed on this day: add date).
The unique number for this portfolio is: 563568
Please note that this is your exam and any irregularities will be dealt with in an appropriate
manner!
, lOMoARcPSD|44660598
QUESTION 1 [30]
Question 1.1: The map below shows a cross-country trail run. You need to calculate the compass
bearings from the start back to the start as indicated by the red arrows. Please use the guide to your
answers given in the table.
VTFGTG6TG6
Magnetic declination for 9 X18
23°06’ + ( 60 )= 23°06’ +2°42’ = 25°48’
2020
(6 marks)
Compass bearing Start to 300°NW
A (2 marks)
Compass bearing A to B 260°NW
(2 marks)
Compass bearing B to C 10°NE
(2 marks)
Compass bearing C to D 300°NW
(2 marks)
, lOMoARcPSD|44660598
Compass bearing D to E 7
(2 marks) °NE
Compass bearing E to C 185°SW
(2 marks)
Compass bearing C to F 160°SE
(2 marks)
Compass bearing F to 180°S
Start (2 marks)
Question 1.2: Use the scale given and calculate the total length of the trail run.
HINT: Use straight line distance between points and multiply with 1,2. (This is known as a crow-flight
conversion to approximate a straight line to a path on the ground). (8 marks)
DISTANCE =310mm
310mm x1.2= 372mm
372mm = 20.7Km
18mm
QUESTION 2 [15]
Given the aerial photograph showing part of Pretoria Central below, answer questions 2.1. to 2.4.
Aerial photograph showing Pretoria Central. Source: University of Pretoria
The average ground elevation at this region in Pretoria is 1320 m and the digital camera used to
capture this aerial photograph was on-board an aircraft flying at 1820 m above mean sea level. The
focal length of the camera lens used is 80 mm.
Hint: Use the corners of the aerial photograph as fiducial marks to determine the principal point.
Printing: Print this page, unchanged, together with the accompanying text using the A4 paper size to
enable you to get the most accurate measurements.
Question 2.1: Calculate the scale of the aerial photograph (5 marks).
Answer for Question 2.1:
