If the whole circle bearing of a line is 180°, its reduced bearing is ............

In case of double line river, contours are ............

Anallatic lens is a ............

Horizontal distances obtained tacheometerically are corrected for ............

A deflection angle is ............

In a quadrantal system, the bearing of a line is measured ............

Which of the following errors can be eliminated by taking mean of both face observations?

If L is the specified length of a tape, L1 its actual length and S the measured distance, then the true distance is give…

Ranging is the process of ............