The survey a small area which one of the most important operation for setting up the plane table is ............

The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as …

The method of plane tabling commonly used for establishing the instrument stations only is a ............

Line of collimation ............

In survey it was recorded that ΣRise = 0, then ............

The direct angles may have any value between ............

The orthographical projection of a traverse leg upon the reference meridian is known, as ............

The instrument which is used in plane tabling for obtaining horizontal and vertical distance directly without resorting …

Number of subdivisions per metre length of a leveling staff is ............