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Lab 3 - Level Nets
Purpose:
This lab will expose you to direct differential leveling
over long distances. You will be expected to complete the work to a higher
level of accuracy than in lab 2.
Equipment required:
- Automatic level
- Tripod
- Level rod
Procedure:
- Run the level net shown, starting at BM #11, elevation 908.00 ft.
Use the standard note form for differential leveling. Take turns taking
shots, and agree on a reading before writing it down. Move the level
between each benchmark. Close back on BM #11, perform the standard math
checks, and compute any misclosure. Total misclosure must be less
than 0.10 ft. Adjust your elevations to reflect your errors, and
record the adjusted elevations in your field book..
BM #11 Hydrant,
SE of Hagen Hall, SEFB, Assumed elevation 908.00'
BM #8 Hydrant,
NE of the center of the mall, SEFB
BM #9 Hydrant,
N of the Center for the Arts, SEFB
BM #10 Hydrant,
NE of Bridges Hall, SEFB
BM #11 Hydrant,
SE of Hagen Hall, SEFB
- Run the level net shown starting with BM #2, elevation
906.34 ft. Each crew member should read the instrument for some of the
shots. Clearly mark in your field book who took which shots. Close back
on BM #2, perform the standard math checks, and compute misclosure.
Total misclosure must be less than 0.10 ft. Adjust your elevations
to reflect your errors. Show the math for the adjustments. Record the
adjusted elevations. Submit your field book for grading.
BM #2 Hydrant, corner of 11th St and 7th
Ave, SWFB
BM #3 Hydrant, corner of 11th St and 8th
Ave, SWFB
BM #4 Hydrant, corner of 11th St and 9th
Ave, SWFB
BM #5 Hydrant, corner of 12th St and 9th
Ave, TMB
BM #6 Hydrant, corner of 13th St and 9th
Ave, TMB
BM #7 South end of channel iron, west side of flagpole
BM #8 Hydrant, NE of the center of the mall, SEFB
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