The multiplying constant for the tacheometer is ............ where, f = Focal length of the objective, i = Interval between the stadia lines or hairs and d = Horizontal distance from the optical centre to the vertical axis of the tacheometer

True meridians are generally preferred to magnetic meridians because ............

For removing the parallax ............

The number of horizontal cross wires in a stadia diaphrgram is ............

A bearing of a line is also known as ............

Survey plotting can be done with an accuracy of ............

An axis about which the telescope can be rotated in a horizontal plane is called ............

Geodetic surveying is different from plane surveying because of ............

The working from whole to the part is done in surveying in order to ensure that ............