Contour lines cross ridge or valley lines at

A relatively fixed point of known elevation above datum, is called

Short offsets are measured with

Levelling deals with measurements in

The method most suitable for plotting in hilly areas is

The data obtained from total station can be used in which among the following software directly?

Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas, are…

Two contour lines, having the same elevation

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