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Chain (unit)
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The chain is a unit of length equal to 66 feet, used in both the US customary and Imperial unit systems. It is subdivided into 100 links. There are 10 chains in a furlong, and 80 chains in one statute
The chain is based on the length of Gunter's chain, which is 66 feet (22 yd) long.
The chain is based on the length of Gunter's chain, which is 66 feet (22 yd) long.
Location marker painted on a British railway bridge, showing 112 miles and 63 chains; photograph taken August 2007
Location marker painted on a British railway bridge, showing 112 miles and 63 chains; photograph taken August 2007
Using a DT Ape
Using a DT Ape
Gunter's chain
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Gunter's chain is a distance-measuring device used for surveying. It was designed and introduced in 1620 by English clergyman and mathematician Edmund Gunter. It enabled plots of land to be accurately
Chain (unit)
…John Ogilby, Britannia, 1675 From Gunter's system, the chain and the link became standard surveyors' units of length and crossed to the colonies. The thirteen states of America were expanding westward…
Surveyor's chain, New York state, US, c. 1830. Exhibit in National Museum of American History, Washington, DC, US
Surveyor's chain, New York state, US, c. 1830. Exhibit in National Museum of American History, Washington, DC, US
Standard chain mark in Whanganui, New Zealand, laid down in 1880 to standardize surveys
Standard chain mark in Whanganui, New Zealand, laid down in 1880 to standardize surveys