Surveying
The negative sign is assigned to

Correction for slope
Correction for horizontal alignment
All listed here
Reduction to mean sea level

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Surveying
Pick up the incorrect statement from the following. In a spherical triangle

Sum of the three angles less than six right angles and greater than two right angles
Sum of any two sides is greater than the third
Every angle is less than two right angles
Sum of the three angles is equal to two right angles

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