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Tripod (surveying) A surveyor's tripod with a shoulder strap. The head of the tripod supports the instrument while the feet are spiked to anchor the tripod to the ground. A surveyor's tripod is a device used to support any one of a number of surveying instruments, such as theodolites, total stations, levels or transits.
Level (optical instrument) A level is an optical instrument used to establish or verify points in the same horizontal plane in a process known as levelling. It is used in conjunction with a levelling staff to establish the relative height or levels (the vertical separation) of objects or marks. It is widely used in surveying and construction to ...
Levelling. A wooden tripod holding an optical level is set up firmly on the ground. Levelling or leveling (American English; see spelling differences) is a branch of surveying, the object of which is to establish or verify or measure the height of specified points relative to a datum.
The initial setting operation includes fixing the theodolite on a tripod, along with approximate levelling and centering over the station mark.For setting up the instrument, the tripod is placed over the station with its legs widely spread so that the centre of the tripod head lies above the station point and its head approximately level (by eye estimation).
A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). Two basic designs exist: tubular (or linear) and bull's eye (or circular). Different types of spirit levels may be used by carpenters, stonemasons, bricklayers, other building trades workers ...
Level staff. 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 called a stadia rod.
The Intuit Dome, the LA Clippers' new home, has more than 1,400 toilets to cut down on lines. Steve Ballmer, a former Microsoft CEO, spent $2 billion on the arena, which opened in August.. The ...
The wall of death, motordrome, velodrome[3] or well of death is a carnival sideshow featuring a silo- or barrel-shaped wooden cylinder, typically ranging from 20 to 36 feet (6.1 to 11.0 m) in diameter and made of wooden planks, inside which motorcyclists, or the drivers of miniature automobiles and tractors travel along the vertical wall and ...