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Surveying

Surveying
The normal longitudinal overlap is generally kept

0.6
0.5
0.7
0.75

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Surveying
If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be

+70.7 m, -50 m
+86.6 m, -50 m
+50 m, +86.6 m
+50 m, -86.6 m

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Surveying
The correction for parallax, is

- 8".8 cos α
+ 8".8 cos α
- 8".8 cos α
+ .8" sin α

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Surveying
International Date Line is located along

Greenwich meridian
Equator
Standard meridian
180° longitude

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Surveying
If θ and δ be the latitude of a place and declination of a star respectively, the upper culmination of the star will be north of zenith if its zenith distance, is

θ - δ
θ + δ
δ - θ
(θ + δ)/2

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Surveying
If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is

πR²E/180°
πR²E/360°
πR²E/270°
πR²E/90°

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