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
