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Link (US Survey)


The US survey link is a unit of length used in the United States for land surveying, defined as exactly 7.92 US survey inches. Since one US survey inch is slightly longer than the international inch (due to the US survey foot), the US survey link is approximately 0.201168 meters.


It is part of the US survey system, derived from Gunter’s chain, which is divided into 100 links per chain (66 US survey feet). Links are used to measure small distances in surveying and land measurement.


Key facts:



  • 1 US survey link = 7.92 US survey inches



  • 1 US survey link β‰ˆ 0.201168 meters



  • 100 links = 1 US survey chain (66 US survey feet)



  • 25 links = 1 US survey rod (16.5 US survey feet)



Though the US survey units are being phased out, the US survey link still appears in historical land records and legal surveying documents.



Chain (US Survey)


The US survey chain is a unit of length used historically in land surveying in the United States. It is defined as exactly 66 US survey feet, which is slightly longer than the international foot. Since one US survey foot equals about 0.3048006096 meters, the US survey chain is approximately 20.11684 meters long.


Like the standard chain, it is divided into 100 links, each measuring 0.66 US survey feet. The US survey chain was widely used in the Public Land Survey System to measure land parcels and boundaries.


Key facts:



  • 1 US survey chain = 66 US survey feet



  • 1 US survey chain β‰ˆ 20.11684 meters



  • 10 US survey chains = 1 furlong



  • 80 US survey chains = 1 US survey mile



Though the US survey foot and chain are being phased out in favor of international units, the US survey chain still appears in historical land records and some legal contexts.



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