: a graduated rod used with an instrument having stadia hairs to measure the distance from the observation point to the place where the rod is positioned by observation of the length of rod subtended by the distance between the stadia hairs when these are fixed or of the space between the stadia hairs when they are ...
How do you use stadia rods in surveying?
The surveyor will focus the hand level on the stadia rod, level it with the leveling bubble, and call out the reading on the stadia rod that is in line with the middle cross-hair on the level. The rod person will call out the distance on the tape where they are standing.
What is stadia method in surveying?
Definition of stadia : a surveying method for determination of distances and differences of elevation by means of a telescopic instrument having two horizontal lines through which the marks on a graduated rod are observed also : the instrument or rod.
What is the difference between Levelling and stadia staff Rod?
As nouns the difference between leveling and stadia is that leveling is the process of making something level while stadia is (surveying) a level staff or levelling rod used by surveyors to measure differences in level, or to measure horizontal distances by sighting the stadia hairs.
What is the least count of stadia rod?
Stadia rod is of one piece having 3 to 5 meters length. The smallest subdivision is usually 5 mm.
What is the purpose of stadia hair?
Stadia marks, also called stadia lines or stadia hairs, are crosshairs on the reticle of a theodolite or other surveying instrument that allow stadiametric rangefinding.
How is stadia distance calculated?
The interval between stadia marks in most surveying instruments is 10 mrad and gives a stadia interval factor of 100. The distance between the instrument and a stadia rod can be determined simply by multiplying the measurement between the stadia hairs (known as the stadia interval) by 100.
What does a stadia rod do?
stadia rod—A graduated rod used to measure the distance from the observation point to the place where the rod is positioned.
What is the difference between levelling and stadia staff Rod?
As nouns the difference between leveling and stadia is that leveling is the process of making something level while stadia is (surveying) a level staff or levelling rod used by surveyors to measure differences in level, or to measure horizontal distances by sighting the stadia hairs.
What are stadia lines used for in construction?
Stadia lines are short horizontal lines located above and below the crosshair that runs horizontally. The stadia lines get bisected by the vertical crosshairs which allows for the user to find the distance of the object being sighted.