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5. DATA REDUCTION FORMULAS FOR MANUAL SIGHTING and
READING TABLE
An alternative way to calculate the X Y coordinates is to use the following equations:
Step 1: Let 'The scale reading B1(mm)' = B1 ,'The scale reading A1(mm)'=A1
Step2: Let θ=0.23539256 (rad)
Step3: Define k 1 , k 2 , where:
θ
=
−
+
k
tan(
1
θ
=
+
k
tan(
2
Step 4: Output
Coordinates X (mm):
×
+
56
(
k
1
=
X
−
k
k
2
1
Coordinates Y (mm):
×
112
=
+
Y
56
k
2
Note:
Demo calculation XLS for Manual Sighting and Reading Table attached.
−
340
A
1
)
300
−
B
1
10
)
300
k
) 2
×
k
k
1
2
−
k
1
7
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