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FAKULTI KEJURUTERAAN AWAM DAN ALAM SEKITAR
JABATAN KEJURUTERAAN AWAM
GEOMATIC LABORATORY
Subject Code BFC 2111
Practicle Title TRAVERSE
Practical Code MG 02
Date of Practicle 30TH JANUARY 2012
No. of Group FOURTEEN ( 14 )
Group Leader (1) Mohamad Harris Haikal bin Anuar Rul (CF110518)
Name of Group Members (2) Mohamad Shafie bin Mustafa (AF100077)
(3) Noor Atiqah binti Mohd Yunus (CF110286)
(4) Noor Liyana binti Ahmad Khashairi (CF110364)
(5) Nor Alia Juliana binti Che Sang (CF110474)
Lecturer’s Name
PM Nawawi bin Jusoh
En Anuar bin Mohd Salleh
En Isyham bin Ismail
En Mohd Khairi bin Burhanuddin
En Kamaruzzaman bin Musa
En Nik Muhd Zaini bin Nik Jusoh
En Amir bin Zaki
Mark Introduction
Objective
Theory
Equipment
Procedure
Data / Table
Data Analysis
Discussion
Plotting / Present
Conclusion / Recommendation
Revision
Mark
Examiner’s Comment Approval Receive
1.0 INTRODUCTION
Traverse is a form of a control survey that requires the establishment of a series of
stations that are linked together by angles and distances. The use of traverse surveys is very
fundamental and has become one of the most common methods in geomatic engineering work.
There are 2 types of traverse that can be used open traverse and closed traverse. In this project,
our group will determine the traverse surrounding the ‘KM Chalet JULIA and PUTRI 1-2 ’.
The type of traverse that we used is closed traverse.
2.0 OBJECTIVE
1. To obtain the traverse control, produce the boundary for Chalet Julia and Putri 1-2 area
and transferring coordinates to other purposes to build the traverse map.
2. To identify and determine the traverse class and the uses.
3. To determine the disclosure and mistaken at the fieldwork and solve the problem with
consultation, references, and present work.
3.0 THEORY
In survey, traverse is defined as the field operation of measuring the lengths and
direction of a series of straight lines connecting a series of points on the earth. Each of these
straight lines is called a traverse line, and each point is called a traverse station. Traverse
stations are commonly marked with wooden peg, stake, nail or iron pipe.
Traverse line are measured using total station. Traversing need to start from reference
datum (coordinate, bearing and distance are known). At each traverse station, a horizontal angle
is measured and used to determine the bearing of the next traverse line. These measurements
are used to compute the relative horizontal position of each unknown traverse station. The main
purposes of traverse are:
Property surveys to locate and establish boundaries
Supplementary horizontal control for topographic mapping surveys
Location and construction layout surveys for highways, railways, and other
private or public works
A total station is an electronic / optical instrument used in modern surveying. The total
station is an electronic theodolite integrated with an electronic distance meter (EDM) to read
distances from the instrument to a particular point. A theodolite is an instrument for measuring
both horizontal and vertical angles. A traverse framework can be OPEN or CLOSED traverse;
start at known point and ends at another known point or the same point.
4.0 EQUIPMENTS
Total Station (1 set)
Prisms (2 sets)
Pegs (4 pegs)
Tripod (3sets)
Hammer (1 set)
Nails
5.0 PROCEDURE
1. The prism was set up at point 1401 and station 2, while total station was set up at station
3.
2. The instrument was ensured centered and leveled.
3. The instrument was set to the required datum which was station 3, where the bearing
was given.
4. The bearing and distance reading of face left horizontal to back sight station was
recorded.
5. The instrument and sight foresight station was turned.
6. The bearing and distance reading of face left horizontal to foresight station was
recorded.
7. The instrument was transited from face left to face right.
8. The bearing of required datum was set to back sight station.
9. The bearing and distance reading of face left horizontal to back sight station was
recorded.
10. The instrument was turned to face foresight station.
11. The reading of face left horizontal was recorded to foresight station.
12. The mean bearing of foresight station was recorded.
13. The instrument was moved to the next station (foresight station).
14. The next traverse line bearing were respect or correspond to the previous mean bearing.
7.0 DATA ANALYSIS
To find error of closure :
i. L for the latitude is = 0.010m
ii. D for this departure = 0.011m
Error of closure can get by this way :
L2
+ D2
= (0.010)2
+ (0.011)2
= 0.015m
To calculate corrected latitude and departure
Station Latitude Departure
1401 -0.002 +0.002
1402 +0.004 -0.004
2 +0.001 -0.001
3 -0.004 -0.004
To find area:
Coordinate N/S = (55423.065 x 33509.140) + (55427.195 x 33505.004) +
( 55392.082 x 33496.567) + (55386.976 x 33492.730)
= 7424773253 m2
Coordinate E/W = (33492.730 x 55427.195) + (33509.140 x 55392.082) +
(33505.004 x 55386.976) + (33496.567 x 55423.065)
= 7424772592 m2
Area = 7424773253 – 7424772592
2
= 330.5 m2
8.0 DISCUSSION
The reference boundary point that we used is datum 173° 54’ 40” based on the
boundary site near chalet at KM Chalet Kuala Linggi. This measurement is done by using
closed traverse and to mark the area of traverse work, 4 pegs used and every distance of the peg
is more and less than 30m from each other. In our traverse measurement, we found out that our
misclosure is 30” which below the allowable misclosure of 2’30”. The correction for our
readings is 0’08” for each 4 stations.
In this traverse work, there are some error might occur and makes our measurement not
accurate. These errors such as the total station and prism did not set up properly. When the total
station and prism did not well setting up, the reading will misread thus create error because the
total station is not level. The others factor that creating error is the unstable condition of the soil
either it’s to soft or hard. After the tripod has been setting up in the unstable soil, it will slowly
sink into the ground thus creating error in the total station and prism. The bubble will no longer
in the center of the circle.
The defect in the total station and prism that been used in the traverse work also create
error in the reading. The refraction in the total station also creates error in the readings. The
mistakes in booking and readings also create error. Our group will determine the traverse
surrounding the ‘KM Chalet Julia and Putri 1-2’. The reference boundary point or datum that
we used for measured are at point 173° 54’ 40” based on the boundary site. The type of traverse
that we used is closed traverse. 4 pegs are used including 1 datum and every distance of the peg
is ±30m from each other for marking the area of traverse work. The bearing misclose and
correction occur because of the errors while doing the traverse work where the total station and
prism does not set up well.
The other reason is that the prism is not place in the exact point. If the prism is not well
place for example the prism is place at the side of the point, the bearing will slightly difference
from the exact bearing. The mistake in booking will also contributed to the error. If one of the
values is wrong, it will affect to all the calculation.
10.0 CONCLUSION/RECOMMENDATIONS
10.1 CONCLUSION
From the traverse work, the coordinate for each pegs and station is determined. The
traverse maps surrounding ‘KM Chalet Julia and Putri 1- 2 has been created. Our traverse class
is Class 2 which use in engineering survey as we all know that 2nd
class of traverse is use to
agriculture purpose. The coordinates for each pegs and stations is determine and the traverse
work surrounding the ‘KM Chalet Julia and Putri 1-2 is created. Coordinates will represent the
value in mapping the traverse plan. From that, we can use the plan for the tachymetry work and
the setting up also can be done.
10.2 RECOMMENDATION
1. Make sure the total station and prism is level and well set up by referring the bubble
which should be in the centre of the circle.
2. Make sure the datum that being used is checked first before proceed with the readings.
3. The traverse work should be started and ended at the same known datum line.
4. Before finishing the traverse work, make sure the misclosure does not exceed the
allowable misclosure, eg- 2nd
class-2’30”. If exceed this value, the traverse work must
repeating again.
11.0 REVISION
1. Abd. Shukor Sarif, Modul Pengajaran Kejuruteraan Geomatik , Universiti Tun Hussein
Onn.
2. Modul Ukur Kejuruteraan 1, Kementerian Pengajian Politeknik Malaysia.
3. www.hbp.usm.my/hilmy/traverse.pdf
4. www.ce.memphis.edu/1112/notes/.../traverse/Surveying_traverse.pdf
5. www.icmsurveysystems.com/surveying_techniques.htm