The horizontal angle between the truth meridian and magnetic meridian is known as ............

In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to ............

Cumulative error that occur in chaining are proportional to ............

Substense bar is an instrument used for ............

For locating the locations of the individual points according to situation we resort to ............

Two hill tops A and B 20 km apart are intervened by a third top C. If the top most contour of the three hill tops are of…

For preparation of contour plan for a route survey ............

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

In horizontal angles, the error due to imperfect leveling of the plate bubble is ............