rod—¹A unit of length equal to 5 1/2 yards or 16 1/2 feet. ² The corresponding square measure; perch, pole. ³Any slender bar, as of wood or metal. Specifically, a bar or staff for measuring.

rod, leveling—See leveling rod.

rod, meter—See meter rod.

rod, range—See range rod.

rod, stadia—See stadia rod.

rod correction—See correction, rod [LEVELING].

rod-foot-meter—A stadia rod, marked in feet and tenths on one side, and rotten and hundredths on the other side; used to determine distances and elevations in one unit of measurement and to check them by readings in a different unit.

rod level—See level, rod.

rod person—A person who is responsible for moving a leveling rod from point to point during leveling, for ensuring that the rod is held perpendicularly while it is being observed, and for other associated duties such as moving the target, if the leveling rod has one.

rod reading—The number on the rod that is level with the height of die observing instrument. Differencing the instrument height and the rod reading gives the change in elevation between the site of the instrument and the observation point where the rod is located. Must be taken when the rod is plumb. For rod readings taken when the rod is not at horizontal with the instrument, the vertical angle and slope distance are also recorded. See also rod person; waving the rod.

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Source: NSPS “Definitions of Surveying and Related Terms“, used with permission.

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