Entry from US English dictionary
A graduated pole with a movable marker, held upright and used with a surveying instrument to measure differences in elevation. Also called leveling pole, leveling staff.
- Rod scale error arises when leveling rods are shorter or longer than indicated by the graduations.
- Then the image of the vertical leveling rod will be seen through the telescope as horizontal.
- The leveling rods were calibrated in March 1995 by the U.S. Navy Gage and Standards Laboratory, Pomona.
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