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  2. Gunter's chain - Wikipedia

    en.wikipedia.org/wiki/Gunter's_chain

    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.

  3. Chain (unit) - Wikipedia

    en.wikipedia.org/wiki/Chain_(unit)

    A longer chain of 100 feet (30.5 m), with a hundred 1 foot (305 mm) links, was devised in the UK in the late 18th century by Jesse Ramsden, though it never supplanted Gunter's chain. [7] Surveyors also sometimes used such a device, and called it the engineer's chain.

  4. Link (unit) - Wikipedia

    en.wikipedia.org/wiki/Link_(unit)

    A Gunter's chain showing the individual 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.

  5. Public Land Survey System - Wikipedia

    en.wikipedia.org/wiki/Public_Land_Survey_System

    Distances were always measured in chains and links, based on Edmund Gunter's 66-foot measuring chain. 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).

  6. Ramsden surveying instruments - Wikipedia

    en.wikipedia.org/wiki/Ramsden_surveying_instruments

    The term chain in both cases usually refers to the measuring instrument rather than a unit of length, and distances measured are normally given in feet and decimal fractions of a foot (not inches). Despite Ramsden's chain originating in the UK, Gunter's predominated there: "When a chain is spoken of without qualification, Gunter's chain is ...

  7. Construction surveying - Wikipedia

    en.wikipedia.org/wiki/Construction_surveying

    In the case of roads or other linear infrastructure, a chainage (derived from Gunter's Chain - 1 chain is equal to 66 feet or 100 links) will be established, often to correspond with the centre line of the road or pipeline.

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  9. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    American surveyors use a decimal-based system of measurement devised by Edmund Gunter in 1620. The base unit is Gunter's chain of 66 feet (20 m) which is subdivided into 4 rods, each of 16.5 ft or 100 links of 0.66 feet. A link is abbreviated "lk", and links "lks", in old deeds and land surveys done for the government.