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

The adjustable cross-staff is used for setting out an offset ............

Contour lines cross ridge or valley lines at ............

In a reverse curve, the super elevation provided at the point of reverse curvature is ............

When the centers of the arcs lie on the opposite sides of the common tangent at the junction of the two curves, it is kn…

The horizon glass of the box sextant is ............

During secular variation of magnetic meridian at different places ............

The method of intersection in plane tabling is commonly used for ............

The included angles of a theodolite traverse, are generally measured ............