14 - surv plate
DESCRIPTION
SURVEYING PLATETRANSCRIPT
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CE 311L Fieldwork # 14 STADIA LEVELING
Year & Section 3CE-A Date Performed October 15, 2014
Group No. 1 Time Started
Actual Site UST Grandstand Time Finished
Weather
Condition CLOUDY Date Submitted OCTOBER 21,2014
Group Members Designation
ABADO, NICOLE LOUISE, L. Chief of Party / Photographer
ABELLA, JAYDEE ANNE, C. Data and Record
ALBIS, MARJORI, M. Writer / Illustrator
ANGELES, SANTIAGO JR., V. Surveyor
AYUYAO, GIL OLIVER L. Surveyor
BAUTISTA, HEINRICH VANN, V. Rod Man / Illustrator
BERONA, CHRISTELLE MARIE, A. Data and Record
CAC, ANTHONY NATHANIEL, D. Rodman
Fieldwork No. 14
Stadia Leveling I. Objective
To determine the elevation of points using stadia method. II. Introduction
The stadia method provides a faster method of leveling in rough and hilly terrain where a high
degree of precision is not required. The process involved is very identical to that in differential leveling. The main difference is that the line of sight in stadia leveling does not have to be brought a horizontal position as in differential leveling.
III. Activities Procedure:
1. Set up and level the instrument at any convenient location along the designated survey route.
The telescope does not have to be levelled. 2. Take a backsight on the rod held at the bench mark and observe and record the upper, middle,
and lower stadia hair readings, as well as the vertical angle.
3. Establish a turning points ahead of the instrument station and along the general direction of the survey route;
4. Take a foresight on the rod held at the turning point and observe and record same variables; and
5. Transfer the instrument to a new location in advance of the turning point, and repeat the process of taking all four readings at each point being sighted. Continue the process until an observation (foresight) on the terminal point is taken.
The Pontifical and Royal
University of Santo Tomas The Catholic University of the Philippines
Faculty of Engineering Department of Civil Engineering
CE 311L: Surveying Fieldwork/Laboratory
Lab 6, Ground Floor, Roque Ruao Bldg., Espaa
Boulevard, Sampaloc, Manila, Philippines 1008
(632)406-1611 loc. 8516
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CE 311L Fieldwork # 14 STADIA LEVELING
IV. Formulas
VD = Ks cos sin + C sin DE = RRb VDb + VDf - RRf
VD = Kscossin
K = 101.69
S = upper lower
V. Data and Results
14.1. Reading Data
STA
OCC
STA
OBS
Backsight Foresight
Upper Middle Lower Vertical Upper Middle Lower Vertical
Angle()
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CE 311L Fieldwork # 14 STADIA LEVELING
Angle()
Guard House GH 2.5 2.41 2.32 3
Arch of the
Century
BM1 2.9 2.51 2.22 1 2.25 2.22 217 5
Benavidez
Monument
BM2 1.98 1.70 1.55 1 3.17 2.74 2.30 1
AMV Balcony BM3 0.72 0.57 0.43 20 0.86 0.66 0.47 15
AMV Ground
Floor
BM4 1.75 1.64 1.54 1 1.76 1.66 1.56 1
Health Service BM5 1.79 1.625 1.46 1 1.87 1.72 1.56 1
Main Building
Ground Floor
BM6 2.19 1.98 1.78 1 1.94 1.78 1.61 1
Martyrs
Monument
BM7 1.61 1.505 1.40 1 3.26 2.82 2.38 1
UST Grandstand BM8 1.66 0.47 0.30 2.25 1.40 0.89 0.57 3
Fountain of
Wisdom
BM9 2.60 2.07 1.88 1 1.89 1.67 1.47 1
Main Building
Rooftop
BM10 2.89 2.07 1.32 6.67
14.1.2. Inclined Sights
STA
OCC
STA
OBS
Backsight Foresight DE
(m)
Elevation
(m) s () VD RR s () VD RR
Guard House GH 0.18 3 0.957 2.41
Arch of the
Century
BM1 0.68 1 1.207 2.51 0.08 5 0.706 2.22 -0.061 100
Benavidez
Monument
BM2 0.38 1 0.674 1.70 0.87 1 1,545 2.74 0.107 99.939
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CE 311L Fieldwork # 14 STADIA LEVELING
AMV Balcony BM3 0.29 20 7.172 0.57 0.39 15 9.915 0.66 10.281 100.046
AMV Ground
Floor
BM4 0.21 1 0.373 1.64 0.20 1 0.355 1.66 -7.907 100.327
Health Service BM5 0.33 1 0.586 1.625 0.31 1 0.550 1.76 0.097 100.420
Main Building
Ground Floor
BM6 0.41 1 0.728 1.98 0.33 1 0.586 1.78 -0.155 102.517
Martyrs
Monument
BM7 0.21 1 0.373 1.505 0.88 1 1.562 2.82 -.006 102.362
UST
Grandstand
BM8 1.36 2.25 5.425 0.97 1.03 3 5.474 0.89 5.716 100.356
Fountain of
Wisdom
BM9 0.72 1 1.278 2.07 0.42 1 0.745 1.67 -5.380 108.072
Main Building
Rooftop
BM10 1.57 6.67 18.409 2.07 17.131 119.823
VI. Computations
TRANSIT: For (FS) BM1: VD = (101.69)(0.08)cos5sin5
= 0.706 FOR HI1: DE =2.41-0.957+0.706-2.22
=-0.061 Elevation for BM1:
100+(-0.061) = 99.939 VII. Drawings and Figures
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CE 311L Fieldwork # 14 STADIA LEVELING
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CE 311L Fieldwork # 14 STADIA LEVELING
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CE 311L Fieldwork # 14 STADIA LEVELING
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CE 311L Fieldwork # 14 STADIA LEVELING
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CE 311L Fieldwork # 14 STADIA LEVELING
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CE 311L Fieldwork # 14 STADIA LEVELING
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CE 311L Fieldwork # 14 STADIA LEVELING
VIII. Sources of Errors
In this 14th fieldwork, we latter found out that the following circumstances may bring and might have brought mistakes in our data. Since it was raining, we couldnt avoid the moistening of the lenses
of our instrument. This lead to a great mistake in the measurement. Thus it may also destroy the instrument. Because of this, we might have as well took wrong sighting of differences of elevation between points wrong measure the length of traverse lines and so are other Natural, Physical,
Instrumental errors follow and contribute.
IX. Conclusion and Remarks
In this fieldwork we were given the chance not to lock the vertical angles of the telescope thus giving us a
greater range to measure. The elevation of any object is its vertical distance above or below an established
height on the earth's surface. The group was able to determine the elevations of the different bench marks
in UST by using stadia leveling and applying our past knowledge about differential leveling. Thus, through
application of the basic knowledge in surveying done on the past fieldworks, we achieve and end on
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CE 311L Fieldwork # 14 STADIA LEVELING
accurate, precise measurements. Proper installation of instruments and usage is strictly advised to arrive
at an accurate data.
X. References
https://engineering.purdue.edu/~asm215/topics/difflevl.html