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A quarter chain, or 25 links, measures 16 feet 6 inches (5.03 m) and thus measures a rod (or pole). Ten chains measure a furlong and 80 chains measure a statute mile. [1] Gunter's chain reconciled two seemingly incompatible systems: the traditional English land measurements, based on the number four, and decimals based on the number 10.
This law defined a survey grid system of 6–mile–square townships divided into 1–mile–square sections, with the defining unit being the chain, specifically Gunter's chain. This was the first unit of measurement designated into law by Congress. This law and the way it defined the survey grid ended debate over Jefferson's decimal system. [2]
The UK statute chain is 22 yards, which is 66 feet (20.1168 m). This unit is a statute measure in the United Kingdom, defined in the Weights and Measures Act 1985. [6] One link is a hundredth part of a chain, which is 7.92 inches (20.1168 cm).
The pole is commonly used as a measurement for Allotment gardens. (See also perch as an area and a volume unit.) 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.
The link (usually abbreviated as "l.", "li." or "lnk."), sometimes called a Gunter’s link, is a unit of length formerly used in many English-speaking countries. In US customary units modern definition, the link is exactly 66 ⁄ 100 of a US survey foot , [ 1 ] or exactly 7.92 inches or 20.1168 cm.
Eighteenth-century surveyors used Gunter's chains which were 22 yards long (one chain with 100 links of 7.92 inches). Their accuracy was adequate for cadastral surveying but they were deemed insufficiently accurate for the Anglo-French Survey (1784–1790) , Britain's first high-precision survey.
Approximately 38.4 million Americans had been diagnosed with diabetes as of 2021 — but about three times that many are in danger of developing the disease, even if they don’t know it. Nearly ...
Europeans used chains with links of a known length such as a Gunter's chain, or measuring tapes made of steel or invar. To measure horizontal distances, these chains or tapes were pulled taut to reduce sagging and slack. The distance had to be adjusted for heat expansion. Attempts to hold the measuring instrument level would also be made.