CE 111_ Lab 4
docx
keyboard_arrow_up
School
Iowa State University *
*We aren’t endorsed by this school
Course
111
Subject
Industrial Engineering
Date
Jan 9, 2024
Type
docx
Pages
6
Uploaded by BailiffOctopusPerson902
CE 111
Lab 4 – Traversing with the TS
Page 1
Table of Contents
Introduction………………………………………………………………….3
Procedure……………………………………………………………………3
Calculations…………………………………………………………………4-5
Conclusion…………………………………………………………………...5
Appendix……………………………………………………………………..6
Page 2
Objectives:
Develop field experience measuring distances and angles with a total station on a
closed traverse. Gain experience in traverse adjustment.
Introduction:
Each team will have a total station to measure the distance and angles between points
of a traverse in the outdoor classroom. Students will use the points previously used for
labs. Your traverse should consist of a four-sided figure. Set up the total station at all of
the corners. Direct and reverse angular readings will be taken at each corner to the
adjoining corners. Distances will also be measured, in direct and reverse, to each of the
adjoining corners.
Procedure:
1. Locate your assigned points.
2. Setup (center and level) the total station over your first traverse point (A).
3. Measure and record angles and distances using direct and reverse modes. Be sure
to zero-set the instrument before recording angles and turn the total station to the right.
4. Repeat steps 2 and 3 for the other points ~ be sure to take turns setting up the total
station.
5. As you are measuring, assess the consistency of your readings. If your average
angle varies more than 20 seconds from the first reading or your distance varies by
more than 0.10 feet, repeat the measurement.
6. Assume the azimuth of your starting line, based on cardinal directions.
7. Be sure to power off the total station, undo the locks, and take it off the tripod to
move. Do not jam rods into the ground. Do not sit on total station cases.
Calculations:
Calculation for the traversing is given in appendix 2.
Results:
Relative precision = 1/850 > 1/5000 (discussed in conclusion)
Northing and easting
Page 3
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Point
Northing (Y) (ft)
Easting (X) (ft)
A
3000
1000
B
3000
1065.33
C
2937.36
1059.889
D
2943.49
999.98
Inverse lengths
Length
Distance (ft)
AB
65.33
BC
62.88
CD
60.46
DA
56.51
Inverse Azimuths
Azimuth
(AB)
90°00’00”
Azimuth
(BC)
184°57’52”
Azimuth
(CD)
275°50’4”
Azimuth
(DA)
0°7’50”
Conclusion
:
The calculated relative precision of the measurements is 1:850, about six times the goal
precision of 1:5000. There was also a 12 minutes and 49 seconds error in the angles
and the preferred error is 20 seconds. Due to limited practice with the equipment used,
this is probably due to user and random error while operating and moving the total
station. With more experience the team would likely have achieved a smaller, better
value for relative precision.
Page 4
Page 5
Page 6
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help