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The principle of operation of such a scale hypsometer is based on the idea of similar triangles in geometry. First the adjustable vertical scale is set at a suitable height. Then as in step 1 in the illustration, a sighting is taken on the top of the object whose height is to be determined, and the reading on the horizontal scale, h', recorded.
Topographer's rods are special purpose rods used in topographical surveys. The rod has the zero mark at mid-height and the graduations increase in both directions away from the mid-height. In use, the rod is adjusted so that the zero point is level with the instrument (or the surveyor's eye if he is using a hand level for low-resolution work).
A stadiometer is a piece of medical equipment used for measuring human height. It is usually constructed out of a ruler and a sliding horizontal headpiece which is adjusted to rest on the top of the head. [1] Stadiometers are used in routine medical examinations and also clinical tests and experiments.
A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]
A height gauge is a measuring device used for determining the height of objects, and for marking of items to be worked on. [1] These measuring tools are used in metalworking or metrology to either set or measure vertical distances; [citation needed] the pointer is sharpened to allow it to act as a scriber and assist in marking out work pieces. [1]
After careful setup of the level, the height of the crosshairs is determined by either sighting from a known benchmark with known height determined by a previous survey or an arbitrary point with an assumed height is used. Sighting is done with an assistant surveyor who holds a graduated staff vertical at the point under measurement. The ...
It is used in surveying and building with a vertical staff to measure height differences and to transfer, measure and set heights. Also called a builder's level or leveling instrument. Fore sight (FS) – short for "fore sight reading", the last staff reading taken before changing the instrument to the other position. It is the staff reading ...
A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a rule and one or more interchangeable heads that can be attached to the rule. [1] [2] Other names for the tool include adjustable square, combo square, and sliding square.
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