At magnetic poles, the dip of magnetic needle is

Reading of the metric levelling staff can be taken accurately up to

A contour map of the area is essential before proceeding with the construction of

For adjusting the traverse, which of the following methods can be used?

The angle by which the forward tangent deflects from the back tangent of a curve is called

Tacheometry is best suited

A prismatic compass is used to determine

On a diagonal scale, it is possible to read up to

'Point of curve' is