: 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 a stadia in measurement?

Greek unit of measurement, the stade, the distance covered in the original Greek footraces (about 600 feet [180 metres]).

What is meant by Tacheometer?

A tachymeter or tacheometer is a type of theodolite used for rapid measurements and determines, electronically or electro-optically, the distance to target, and is highly automated in its operations. Such tachymeters are often used in surveying. Tachymetry or tacheometry is the process of measuring distance indirectly.

stadium (noun; plural stadia; Latin stare, to stand): 1. The stage or period in an animals life. 2. The interval between molts of a larva; stade.

### Which is the best definition of the word stadia?

noun a method of surveying in which distances are read by noting the interval on a graduated rod intercepted by two parallel cross hairs (stadia hairs or stadia wires) mounted in the telescope of a surveying instrument, the rod being placed at one end of the distance to be measured and the surveying instrument at the other. a plural of stadium.

### What is the distance between the stadia hair?

The distance between the top and bottom stadia hair is identified as i(stadia hair spacing). The distance between the top and bottom reading on the rod is identified as I(stadia intercept). The distance from the instrument operator’s eye to the stadia reticle (eyepiece) is identified as f (focal length).

What is the distance between the stadia marks?

If one observes a vertical length on a stadia rod, rule or levelling rod with the telescope and sees that the rod spans 0.500 m between the marks (the stadia interval), then the horizontal distance from the instrument to the rod is: 0.500m x 100 = 50 m. In the adjacent image, the upper stadia mark is at 1.500 m and the lower at 1.345 m.