sta·dia ˈstā-dē-ə : 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.
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stadia- 1 A method of surveying in which distances and elevations are obtained by observing the interval on a graduated, upright rod (stadia rod) ...
The process of measuring distances and elevations by observing through a telescope the distance intercepted on a rod between two horizontal cross-hairs.
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 ...
Stadia marks, also called stadia lines or stadia hairs, are crosshairs on the reticle of a theodolite or other surveying instrument that allow stadiametric ...