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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.

Statute League

A statute league is a traditional unit of distance used primarily on land and defined as 3 statute miles, which equals about 4.83 kilometers or 15,840 feet. It was commonly used in English-speaking countries for measuring distances before the metric system became widespread. The statute league is different from the nautical league, which is based on nautical miles and used at sea. Although largely obsolete today, the statute league is still found in historical texts and older maps.