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ISM520S - INTRODUCTION TO SURVEY AND MAPPING - 2ND OPP - JAN 2024 |
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n Am I BI A u n IVER s I TY
OF SCIEnCE Ano TECHnOLOGY
FACULTYOF ENGINEERINGAND THE BUILTENVIRONMENT
DEPARTMENTOFLANDAND SPATIALSCIENCES
QUALIFICATION: BACHELOROF QUANTITY SURVEYING, BACHELOROF GEOINFORMATION TECHNOLOGY,
BACHELOR OF LAND ADMINISTRATION, BACHELOR OF ARCHITECTURE, BACHELOR OF TOWN AND
REGIONAL PLANNING
QUALIFICATIONCODE: 07BQOS, 07BGEI,
07BLAM, 07BARC, 07BTAR
LEVEL:5
COURSE: INTRODUCTION TO
SURVEYAND MAPPING
COURSECODE: ISM520S
SESSION: JANUARY 2024
PAPER:
THEORY
DURATION: 3 HOURS
MARl<S:
100
SECONDOPPORTUNITY/SUPPLEMENTAREYXAMINATIONQUESTIONPAPER
EXAMINERS: Ms D. Husselmann and Mr D Varges
MODERATOR:Mr S. Sinvula
THISQUESTIONPAPERCONSISTSOF 9 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. Calculators and other drawing equipment
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Introduction to Survey and Mapping
Question 1
1.1. What do the following acronyms stand for?
a. MSL-
b. GIS-
c. Glm-
d. EDM-
e. RTK-
1.2. State whether the following are True or False.
a. A theodolite and total station both measure distance and direction.
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b. An automatic level does not need to be levelled at all as a compensator inside the
level makes it exactly levelled.
c. For the Namibian LO co-ordinate system, it is convention to write the X before
the Y.
d. The reading to the RO is only taken after the instrument is oriented.
e. Contour lines can be seen in reality.
Question 2
2.1. List ANY TWO branches of surveys and explain what each one entails.
2.2. Distinguish between an Observation and a Measurement.
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Introduction to Survey and Mapping
2.3. Explain the following neat sketches:
a.
b.
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2.4. State the three basic principles that must always be applied during a levelling procedure.
(3)
2.5. Briefly explain how a surveyor would take a level reading on the roof of a tunnel. What is this
method called?
(2)
2.6. Draw a sketch indicating the directions of increasing and decreasing for the co-ordinate
values on the Namibian LO Co-ordinate System for both Y and X.
(4)
2.7. What are the requirements of a Reference Object?
(3)
2.8. List three different methods of determining distance
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2.9. What are the three common corrections applied to both tape and electronic distance (EDM)
measurements?
(3)
[26)
Second Opportunity/ Supplementary Question Paper
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Introduction to Survey and Mapping
Question 3
3.1. What is a traverse?
3.2. Why is it necessary to run a traverse?
3.3. Complete the sentence:
In order to check accuracy (misclosure) one starts a traverse at a,
a. ____
, and ends at a, b.
3.4. Differentiate between horizontal setting out and vertical setting out.
3.5. What is the most accurate method for vertical setting out?
3.6. Mention and differentiate the two Differential GPSsurveying styles.
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3.7. Contour Interval is the vertical distance between any two consecutive contours. The contour
interval is kept the same on a map to depict correct topography of the terrain. The contour
intervals on a map depend on certain factors; name ANY THREEof these factors.
(3)
[14)
Question 4
4.1 The levelling field observations on Data Sheet 1 were carried out by a Surveyor. Reduce the
data sheet using the "Height of Collimation" method to determine the final heights. All
checks need to be shown and the correction needs to be distributed.
(10)
4.2 Use the mean observed directions below measured at TOP to answer the following questions.
Complete in column formats using table 1 and table 2.
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Introduction to Survey and Mapping
@TOP
Height of Instrument = 1.578
Name
Mean Observed Directions
tJ.MOON
211° 49' 30"
tJ.SUN
121° 19' 26"
DD
192° 46' 54"
RO
211 ° 49' 21"
Join Direction TOP to tJ.MOON = 211 ° 49' 40"
Join Direction TOP to tJ.SUN = 121 ° 19' 34"
a. Calculate final observe directions at TOP.
b. Calculate the oriented direction from TOP to DD
4.3 Use information below and answer the questions that follow.
Co-ordinates
Name
y
tJ.LH (i)
+ 6 414.300
tJ.LR (v)
+ 4 790.540
tJ.CIVIC
+ 2 726.090
tJ.KBL
+ 687.270
P3
+ 2 868.080
X
+ 6 308.480
+ 4 282.760
+ 4 833.150
+ 7 999.540
+ 5 650.030
Name
KLOOF
Height of Instrument= 1.675m
Oriented Direction Horizontal Distance
49° 50' 39"
3457.710 m
a. Calculate a Join from P3 to tJ.CIVIC.
b. Calculate the co-ordinates for Kloof from P3.
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Introduction to Survey and Mapping
Question 5
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5.1 Using the oriented directions and reduced distances below, calculate the traverse RM 1, STl,
ST2,ST3, RM 2. Complete Data Sheet 2 to answer this question. Adjustment must be done by
the Bowditch Rule. Determine the linear misclosure and accuracy of the traverse.
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From
RM 1
STl
ST2
ST3
To
STl
ST2
ST3
RM2
Oriented Dir.
185° 18' 40"
111° 20' 30"
90° 00' 00"
84° 10' 10"
Reduced Dist.
391.230m
356.820m
295.890m
381.260m
Co-ordinates
Point
y
RMl
+3 961.300
RM2
+4 932.560
X
+8 371.820
+7 891.020
[17)
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Introduction to Survey and Mapping
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Student Number _________
_
Data Sheet 1
Question 4.1
Height of Collimation LevellingSheet
NOTE:The BOLDand Underlined values are the Inverted Staff Readings.
Answers should be to 3 (0.000) decimal places.
Point
A
B
C
D
E
F
G
H
B.S. I.S.
3.565
2.192
3.077
-2.538
1.515
0.735
1.860
Reduced
F.S. Collimation Heights Heights
1.510
2.523
0.672
Correction
Final
Heights
1296.470
1299.070
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Introduction to Survey and Mapping
Student Number _________
_
Data Sheet 2
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Question 3.2
Table 1: Final Observed Directions
@TOP
!:,MOON
!:,SUN
DD
R/0
Mean Observe
Direction
211° 49' 30"
121° 19' 26"
192° 46' 54"
211° 49' 21"
RO Correction
Fin. Observed
Direction
Table 2: Oriented Direction
@TOP
Name
/:,MOON
!:,SUN
DD
Fin. Observed
Direction
Join
Direction
Difference
/ Correction
Oriented
Direction
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Introduction to Survey and Mapping
Student Number _________
_
Question 5.1
Bowditch Adjustment Sheet
Note: All answers must be rounded off to 3 decimal places
Data Sheet 3
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DIRECTION&
DISTANCE
Vz l
6-.
DIFFERENCES
1::,.y
t:,.X
1as· 18' 40"
391.230m
111° 20' 30"
356.820m
Vl
C
go•oo·00 00
295.890m
-0 .
.Qr.oJ..
:::,
uro
84° 10' 10"
381.260m
f-
0z
0
0
STATION
RM 1
STl
ST2
ST3
RM2
FINAL
y
+3 961.300
COORDINATES
X
+8 371.820
+4 932.560
+7 891.020
Second Opportunity/ Supplementary Question Paper
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January 2023