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height of instrument
A surveying term used in spirit leveling for the height of the line of sight of a leveling instrument above the adopted datum, in trigonometric leveling for the height of the center of the theodolite above the ground or station mark, in stadia surveying for the height of the center of the telescope of the transit or telescopic alidade above the ground or station mark, and in differential leveling for the height of the line of sight of the telescope at the leveling instrument when the instrument is level. Abbrev. HI.
- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
- Product: Dictionary of Mining, Mineral, & Related Terms - 2nd Edition
- Acronym-Abbreviation:
Other Languages:
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