Remarks
|
Backsight
|
Intersight
|
Foresight
|
Rise
|
Fall
|
Reduce
Level
|
Bm1
|
114
|
100
|
||||
A
|
133
|
131
|
17
|
83
|
||
TP1
|
132.5
|
135
|
2
|
81
|
||
Ramp
1
|
374.5
|
133.5
|
1
|
80
|
||
Tp2
|
123
|
136
|
238.5
|
318.5
|
||
B
|
136
|
123.5
|
0.5
|
318
|
||
C
|
138
|
137
|
1
|
317
|
||
TP3
|
48
|
139
|
1
|
316
|
||
Ramp
2
|
61.5
|
13.5
|
302.5
|
|||
TP4
|
107
|
258
|
196.5
|
106
|
||
D
|
110.5
|
126
|
19
|
87
|
||
TP5
|
132
|
130
|
19.5
|
67.5
|
||
BM1
|
116
|
16
|
83.5
|
|||
1548.5
|
1565
|
254.5
|
271
|
There is 2 method in calculate levelling
which is ‘’Rise and Fall’’ and ‘’HI’’ method.
Example of Rise and
Fall method
Besides that, we also learnt how to make correction of
misclosure
Remarks
|
Reduce Level
|
Correction
|
Adjusted Reduce Level
|
Bm1
|
100
|
0
|
100
|
A
|
83
|
1.5
|
84.5
|
TP1
|
81
|
3
|
84
|
Ramp 1
|
80
|
4.5
|
84.5
|
Tp2
|
318.5
|
6
|
324.5
|
B
|
318
|
7.5
|
325.5
|
C
|
317
|
9
|
326
|
TP3
|
316
|
10.5
|
326.5
|
Ramp 2
|
302.5
|
12
|
314.5
|
TP4
|
106
|
12
|
118
|
D
|
87
|
13.5
|
100.5
|
TP5
|
67.5
|
15
|
82.5
|
BM1
|
83.5
|
16.5
|
100
|
This is one of the example of Misclosure Table.
We also learnt what is the required equipment for Levelling.
A levelling staff , tripod, auto level meter, staff bubble.
This
is our first pratical in Taylor University. We are learning on how to use the
auto level meter to measure the BS, IS and FS.
Beside
that’s we also learn practical and Theory of traversing. In theory, the
equipment of traversing is the almost the same as levelling just the levelling
staff changed to rod staff. Traversing is using the azimuth and bearing to
calculate.
The
following is the examples of our Practical field work
|
Station
|
Angle Measured
|
|
A
|
75°
|
|
B
|
70°
|
|
C
|
117°
|
|
D
|
98°
|
|
Points
|
Distances
|
Azimuth
|
Bearing
|
Latitude
|
Departure
|
|
DA
|
8.4
|
98°
|
S 82° E
|
-1.169
|
8.318
|
|
AB
|
12.9
|
353°
|
N 7° W
|
12.804
|
-1.572
|
|
BC
|
7.58
|
243°
|
S 63° W
|
-3.441
|
-6.754
|
|
CD
|
7.55
|
180°
|
0
|
-7.55
|
0
|
|
∑=36.43
|
∑=0.644
|
∑=-0.008
|
|
Points
|
Correction to Latitude
|
Corrected Latitude
|
Correction to Departure
|
Corrected Departure
|
Coordinates
|
Coordinates
|
|
DA
|
-0.147
|
-1.316
|
0.00184
|
8.32
|
100mN
|
100mE
|
|
AB
|
-0.228
|
12.576
|
0.00285
|
-1.57
|
98.683mN
|
108.32mE
|
|
BC
|
-0.133
|
-3.574
|
0.00166
|
-6.752
|
111.259mN
|
106.750mE
|
|
CD
|
-0.132
|
-7.686
|
0.00166
|
0.002
|
107.684mN
|
99.998mE
|
No comments:
Post a Comment