The working edge of an alidade, is known as

In total station, data is stored in

The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, i…

How many types of bench mark are there?

A plain scale is used to read

Which of the following instruments can be used for the direct measurement of directions?

The vertical distance between the elevations represented by adjacent contour lines on a map is called

A level surface to which elevation of different points are referred to, is known as:

The combined correction due to refraction and earth's curvature is