Instruction manual

3.6 Stadia Surveying

This instrument can be used for stadia surveying, Measurement by stadia is

a convenient method for measuring distances with the stadia hairs of the

instrument, in combination with a graduated rod, such as a leveling rod or

stadia rod, which is preferable for long distances. The distance from the cen-

ter of the instrument to the rod is found by sighting through the instrument on

the rod and multiplying the stadia interval by 100. The stadia interval is the

distance between the top stadia hair reading and the bottom stadia fair read-

ing.

Set the rod on the point to be surveyed.

Sight through the telescope of the leveled instrument and determine

the distance or interval, “ d ”, between the top stadia hair reading

and bottom stadia hair reading of the rod.

The horizontal distance “ D ” from the center of the instrument to the

rod is equal to 100 times the stadia interval, “ d ”.

D=100 × d

tadia hairs