The principle of chain surveying is to divided the area into a number of ............

If the whole circle bearing of a line is 270° its reduced bearing is ............

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

The principle of tacheometry is used ............

If d is the distance between equidistant odd ordinates, the Simpson's rule for the areas is ............

A level line is ............

The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectivel…

The sensitivity of bubble tube can be increased by ............

The true meridian of a place is the line in which earth's surface in intersected by a plane through ............