Stadia marks on a crosshair while viewing a metric levelling rod. The top mark is at 1.500 m and the lower is at 1.345 m. The difference between the rod readings is 0.155 m, yielding a distance to the rod of 15.5 m. A typical surveyor's instrument reticle has two pairs of stadia marks.

A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum. When used for stadiametric rangefinding, the level staff is …

Stadiametric rangefinding, or the stadia method / stadiametry, is a technique of measuring distances with a telescopic instrument. The term stadia comes from a Greek unit of length Stadion (equal to 600 Greek feet, pous) which was the typical length of a sports stadium of the time.

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… See the full definition

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stadia rod—A graduated rod used to measure the distance from the observation point to the place where the rod is positioned. The method of reading is by observing the length of the rod subtended by the distance between the stadia hairs when these are fixed, or by noting the space between the stadia hairs when they are adjusted to cover a ...

Stadia rod is of one piece having 3 to 5 meters length. The smallest subdivision is usually 5 mm.

2024年6月17日 · A stadia rod is 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. It is typically used in surveying and leveling to determine distances and differences in elevation.

The meaning of STADIA is 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.

When used with an Engineering Grade Rod, the distance from the instrument to the rod can be determined quickly by subtracting the bottom stadia reading from the top reading and multiplying the difference by 100. 0.40. In this example, subtracting the top reading of 12.38 by the lower reading of 11.98 gives a difference of .40.