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.
the two parallel cross hairs or stadia hairs in the eyepiece of the instrument used
3.
the staff used
Word origin
C19: probably from stadia2
stadia in British English2
(ˈsteɪdɪə)
noun
a plural of stadium
stadia in American English1
(ˈsteɪdiə)
noun
a method of surveying in which distances and elevations are obtained by observing the interval on a graduated, upright rod (stadia rod) intercepted by two parallel horizontal lines (stadia hairs or stadia wires) in a surveyor's transit set up at a distance from the rod