At the magnetic poles, the amount of dip is ............

An angle measured clockwise from the proceeding survey line to the following survey line is called ............

When the image formed by the objective is not situated in the plane of cross-hairs ............

If whole circle bearing of a line is 120°, its reduced bearing is ............

The branch of surveying in which both horizontal and vertical positions of a point, are determined by making in instrume…

The constant vertical distance between two adjacent contours, is called ............

The vertical distance between any two consecutive contours is called ............

For a transit theodolite the least reading on the main scale is 20'. If its vernier scale should read 20", then ........…

The index glass in an optical square is ............