The height of instrument is equal to ............

An arbitrary surface with reference to which the elevation of points are measured and compared, is called ............

If whole circle bearing of a line is 120°, its reduced bearing is ............

The direction of steepest slope on a contour, is ............

In a theodolite the line of collimation is ............

At the equator, the amount of dip is ............

An invert is taken when the point is ............

When the length of chain used in measuring distance is longer than the standard length, the error in measured distance w…

The method of leveling in which the heights of mountains are found by observing the temperature at which water boils is …