Ex 1. Azimuths & Bearings - College of Engineeringxe/Forms For Website/FE Review...F 120 31 3430...
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FE Review-Surveying 1 Ex 1. Azimuths & Bearings • Determine the Azimuth and Bearing for each of the following: (a) N (b) w N 70° W 55° (C) 45 N (d) N W W s 80° S
Transcript of Ex 1. Azimuths & Bearings - College of Engineeringxe/Forms For Website/FE Review...F 120 31 3430...
FE ReviewSurveying
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Ex 1. Azimuths & Bearings • Determine the Azimuth and Bearing for each of the following:
(a) N
(b)
w
N 70°
W 55°
(C)
45
N (d) N
W W
s 80° S
FE ReviewSurveying
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Ex. 2 Area Calculation Boundary and traverse lines bounding an irregular area are shown below. Estimate the total area using all 3 methods.
j
•34' 21' 23' 29' 31'
V > , Traverse Line ^ t \ > • V
3D' 30' 30' 30' 30'
So
21 23 2S 31'
v Traverse Line ^
30 30
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Ex. 2 Area Calculation Boundary and traverse lines bounding an irregular area are shown below. Estimate the total area using all 3 methods.
So. Wis*
21 23 29' 31'
' laveise Lih6
30' 3u
: 237
Area by Coordinates X v Plus Minus
A B C D E F G H I J K L A
Sum Area
Area by Coordinates X v Plus Min us
A 0 0 - -
B 0 34 0 0 C 30 21 1020 0 D 60 23 1260 690 E 90 29 2070 1740 F 120 31 3430 2790 G 150 23 4650 2760 H 150 0 3450 0 I 120 0 0 0 J 90 0 0 0 K 60 0 0 0 L 30 0 0 0 A 0 0 0 0
Sum 15930 7930 Area 3975
Station BS= HI FS- Elevation
Adjusted
Elevation
BM1 5.51 100.000 100.000
TP1 6.53 3.250
BM2 4.32 10.500
TP2 3.277 6.670
BM1 7.890
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Determine differential elevation between 2 points by taking backsights and
foresights on rod
> HI - BM + BS
> Elev = HI - FS
> Closure -
> IBS - IFS
> BMu
Station Distance
(ft)
Bearing
(ϴ)
Departure
Lsin(ϴ)
Latitude
Lcos(ϴ)
Easting
(X)
Northing
(Y)
B 8,755.32 11,250.61
487.52 N18°22'E
C
789.16 S87°10'E
D
825.97 S78°37'E
K
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Objective is to measure the boundaries of a (typically closed) area
• Measure boundary angles and lengths in the field
• Calculate departures AX & latitudes AY
» Calculate coordinates
• Compare calculated and known coordinates
P. 170
LATITUDES AND DEPARTURES
* Lititufr
-Qfntei * Oeparfrre
- Latitude
m
A (T&sgjf traverse is run from Point B to Point K. The known coordinates of
Point K are I l,5N.I5N and IO.507.23E. Find the linear closure error.
Station
(ft)
Cut Area
(ft2)
Fill Area
(ft2)
Cut Volume
(ft3)
Fill Volume
(ft3)
20+00 - 173.21
20+10.50 - 43.56
20+21.50 14.32 9.63
20+28.45 64.73 -
20+40 187.42 -
Average End Volume
𝑉 = 𝐿𝐴1 + 𝐴2
2
Pyrimid/Cone Volume
𝑉 = ℎ𝐵𝑎𝑠𝑒 𝐴𝑟𝑒𝑎
3
FE ReviewSurveying
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