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a. A telescopic instrument having two parallel lines through which intervals on a calibrated rod are observed, used to measure distances.
b. The parallel lines in this instrument.
c. The calibrated rod so used.
2. The technique of measuring distances with this instrument.
[Italian, probably from Latin, pl. of stadium, a unit of length; see stadium.]
A plural of stadium.
a. tacheometry that makes use of a telescopic surveying instrument and a graduated staff calibrated to correspond with the distance from the observer
b. (as modifier): stadia surveying.
2. (Surveying) the two parallel cross hairs or stadia hairs in the eyepiece of the instrument used
3. (Surveying) the staff used
[C19: probably from stadia2]
sta•di•a1(ˈsteɪ di ə)
n., pl. -di•as.
1. a surveying method of measuring distance through the telescope of a transit or alidade by reading the interval that the cross hairs intercept on a graduated rod held upright at the distant point.
2. the rod used for this purpose.
[1860–65; perhaps identical with stadia2]
sta•di•a2(ˈsteɪ di ə)
a pl. of stadium.
a means of surveying in which distances are measured by reading intervals on a graduated rod intercepted by two parallel cross hairs in the telescope of a surveying instrument. — stadia, adj.See also: Measurement
a system of surveying in which distances are measured by reading intervals on a graduated rod intercepted by two parallel cross hairs in the telescope of a surveying instrument. — stadia, adj.See also: Land