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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.
The Public Land Survey System (PLSS) is the surveying method developed and used in the United States to plat, or divide, real property for sale and settling. Also known as the Rectangular Survey System, it was created by the Land Ordinance of 1785 to survey land ceded to the United States by the Treaty of Paris in 1783, following the end of the ...
The primary grid pattern is of quarter sections (1 ⁄ 2 mi × 1 ⁄ 2 mi (800 m × 800 m)). In U.S. land surveying under the Public Land Survey System (PLSS), a section is an area nominally one square mile (2.6 square kilometers), containing 640 acres (260 hectares), with 36 sections making up one survey township on a rectangular grid. [1]
In the Middle Ages, bars were used as standards of length when surveying land. [22] These bars often used a unit of measure called a rod, of length equal to 5.5 yards, 5.0292 metres, 16.5 feet, or 1 ⁄ 320 of a statute mile. [23] A rod is the same length as a perch or a pole. [24] In Old English, the term lug is also used.
In Louisiana, parcels of land known as arpent sections or French arpent land grants also pre-date the Public Land Survey System (PLSS), but are treated as PLSS sections. An arpent can mean a linear measurement of approximately 192 feet (59 m) or an area measurement of about 0.84 acres (3,400 m 2).
Although link chains were later superseded by the steel ribbon tape (a form of tape measure), its legacy was a new statutory unit of length called the chain, equal to 22 yards (66 feet) of 100 links. [8] This unit still exists as a location identifier on British railways, as well as all across America in what is called the public land survey ...
Dominion Land Survey, the method used to divide most of Western Canada into one-square-mile sections for agricultural and other purposes; Public Land Survey System, a method used in the United States to survey and identify land parcels; Survey township, a square unit of land, six miles (~9.7 km) on a side, done by the U.S. Public Land Survey System
Even so, the Mendenhall Order length of the yard continues in use even in 2013 in the United States as the basis for the survey foot. The prior land survey data for North America of 1927 (NAD27) had been based on the survey foot, and a new triangulation based on the metric system (NAD83) was not released until 1986.
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