Cross hairs in surveying telescope, are fitted ............

An imaginary line joining the point of intersection of the cross-hairs of the diaphragm and the optical plane is called …

Local attraction at a place may be due to ............

You have to observe an included angle with better accuracy than what is achievable by a vernier, you will prefer the met…

"Cross-section" and "Longitudinal sectioning" is ............

For indirect ranging, number of ranging rods required is ............

Stadia tacheometry was discovered by James Watt in the year ............

The method generally preferred to for contouring an undulating area, is ............

Axis of altitude level is ............