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Mile (US Survey)


The US survey mile is a unit of length used in land surveying in the United States. It is defined as exactly 5,280 survey feet, with one survey foot equal to 1200/3937 meters (approximately 0.3048006096 meters). This makes the US survey mile equal to about 1,609.3472 meters, slightly longer than the international (statute) mile, which is exactly 1,609.344 meters.


The US survey mile was established to maintain consistency with older land measurement systems based on the Mendenhall Order of 1893. It was commonly used in mapping, legal land descriptions, and public land surveys.


Although the difference between the survey and statute mile is very small (about 3.2 millimeters), it can be significant over large distances. As of 2023, the U.S. has officially retired the survey foot (and survey mile) for most applications, favoring the international foot and mile to standardize measurements.


Long Reed


The long reed is an old English unit of length used primarily in measuring land, especially in agriculture and surveying. It is traditionally equal to 16.5 feet or 5.03 meters.


The long reed was used alongside other units like the rod, pole, and perch, often interchangeably, to measure distances and plot boundaries.


Key points:



  • 1 long reed = 16.5 feet ≈ 5.03 meters



  • Used historically in land measurement and agriculture



  • Equivalent or similar to the rod, pole, or perch



  • Important in English customary measurement systems



Though obsolete now, the long reed is part of the rich history of traditional English measurement units.




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