Search results
Results from the WOW.Com Content Network
Gunter's chain (also known as Gunter's measurement) is a distance-measuring device used for surveying. It was designed and introduced in 1620 by English clergyman and mathematician Edmund Gunter (1581–1626).
The chain (abbreviated ch) is a unit of length equal to 66 feet (22 yards), used in both the US customary and Imperial unit systems. It is subdivided into 100 links. [1] [2] There are 10 chains in a furlong, and 80 chains in one statute mile. [2]
The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.
In many measurement systems based on former English units, the link has remained fixed at 0.66 feet, therefore 0.22 yards or 7.92 inches; it is the absolute length of the yard that has varied. A rare remaining application of the link is in the service of some surveying in the United States, which relates to the definition of the survey foot.
The chain – an actual metal chain – was made up of 100 links, each being 7.92 inches (201 mm) long. Eighty chains constitute one U.S. survey mile (which differs from the international mile by a few millimeters).
Chain: 20.116 m: Four linear rods. Named after the length of surveyor's chain used to measure distances until quite recently. Any of several actual chains used for land surveying and divided in links. Gunter's chain, introduced in the 17th century, is 66 feet (20.1 metres). Furlong: 201.168 m
A chain 66 feet (20 m) long, with intermediate measurements indicated, was chosen for the purpose, and is called Gunter's chain. The length of the chain chosen, 66 feet (20 m), being called a chain gives a unit easily converted to area. [9] Therefore, a parcel of 10 square chains gives 1 acre.
Determination of the rod, using the length of the left foot of 16 randomly chosen people coming from church service. Surveyors in the United States continue to use: chain (22 yards, or 20.1168 m) rod (also called pole or perch) (quarter of a chain, 5 1 ⁄ 2 yards, or 5.0292 m)