"occasionally contested in cross country running and mile runs on the road include the Fifth Avenue Mile in New York City Key: Mile run The mile run (1,760 yards or exactly 1,609.344 metres) is a middle-distance foot race. The history of the mile run event began in England, where it was used as a distance for gambling races. It survived track and field's switch to metric distances in the 1900s and retained its popularity, with the chase for the four-minute mile in the 1950s a high point for the race. In spite of the roughly equivalent 1500 metres race, the"
"Metric mile A metric mile is a distance which approximates one statute mile (1609.344 m) at a round figure of metres (the SI or metric unit of length). The term is most commonly used in track running and swimming. In track running, the 1500 m race became the standard middle distance race in Europe in the late 19th century, and has been the standard distance in the Olympic Games since 1896. The distance of the race is sometimes referred to as a metric mile. Prior to metrication, many tracks in the United States and the Commonwealth of Nations were constructed"
"meters). There are 10 chains or 40 rods in a furlong (eighth-mile), and so 80 chains or 320 rods in one statute mile (1760 yards, 1609.344 m, 1.609344 km); the definition of which was set by Royal surveyor (called the 'sworn viewer') John Ogilby only after the Great Fire of London (1666). An acre is defined as the area of 10 square chains (that is, an area of one chain by one furlong), and derives from the shapes of new-tech plows and the desire to quickly survey seized church lands into a quantity of squares for quick sales by Henry"
"measure"" but used a linear perch measuring as opposed to the English rod of . The international mile is precisely equal to (or km as a fraction). It was established as part of the 1959 international yard and pound agreement reached by the United States, the United Kingdom, Canada, Australia, New Zealand, and South Africa, which resolved small but measurable differences that had arisen from separate physical standards each country had maintained for the yard. As with the earlier statute mile, it continues to comprise 1,760 yards or 5,280 feet. The old Imperial value of the yard was used in"
"trades, on the basis that it is easier to remember an integer number of inches plus a fraction than a measurement in millimeters, or that foot-inch measurements are more suitable when distances are frequently divided into halves, thirds and quarters, often in parallel. The metric system also lacks a parallel to the foot. For measuring length, the U.S. customary system uses the inch, foot, yard, and mile, which are the only four customary length measurements in everyday use. Since July 1, 1959, these have been defined on the basis of 1 yard = 0.9144 meters except for some applications in"
"leg of a distance medley relay uses a four lap 1600 m leg; The standard middle distance in many United States high school competitions is 1600 m and this distance is sometimes referred to as a metric mile as well. In swimming, the 1500 m (or 1650 yards) race is commonly referred to as ""the swimmer's mile"", and is often the longest distance swum by competitors in a pool. The standard distance triathlon also employs the swimmer's mile, except in open water instead of a pool. Metric mile A metric mile is a distance which approximates one statute mile (1609.344"
"Using official modern definitions, one nautical mile is exactly 1.852 kilometres, which implies that 1 kilometre is about nautical miles. This modern ratio differs from the one calculated from the original definitions by less than one part in 10,000. For much of the history of mathematics, even the greatest thinkers considered it impossible to compute the length of an irregular arc. Although Archimedes had pioneered a way of finding the area beneath a curve with his ""method of exhaustion"", few believed it was even possible for curves to have definite lengths, as do straight lines. The first ground was broken"
"were common markers on the roads in India. Minimum length = 1 Inch<br> No-one can say how it evolved. ""Yinch"" was the thickness of the thumb, not quite one inch.<br> 12 Inches = 1 Foot<br> 3 Feet = 1 Yard<br> 660 Feet = 1 Furlong<br> 5,280 Feet = 1 Mile<br> 1,760 Yards = 1 Mile<br> 1 Mile = 8 Furlongs<br> 22 Yards = 1 Chain<br> 1 Acre = (1 Chain) × (1 Furlong) 1 Canal mile = 5000 imperial feet on canals shown by stone marker each 5000 feet and also on British maps at 1:63360 scale and later Pakistan"
"Chain (unit) The chain is a unit of length equal to 66 feet (22 yards). It is subdivided into 100 links or 4 rods. There are 10 chains in a furlong, and 80 chains in one statute mile. In metric terms, it is 20.1168 m long. By extension, chainage (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer. The chain has been used for several centuries in England and in some other countries influenced by English practice. In the United Kingdom, there were 80 chains to the"
"Chain Road, by Lee Kernaghan, include the line ""He lived out on the three chain road"". Chain (unit) The chain is a unit of length equal to 66 feet (22 yards). It is subdivided into 100 links or 4 rods. There are 10 chains in a furlong, and 80 chains in one statute mile. In metric terms, it is 20.1168 m long. By extension, chainage (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer. The chain has been used for several centuries in England and in some"
"(NAD27). This had been constructed by triangulation based on the definition of the foot in the Mendenhall Order of 1893, with 1 foot = metres and the definition was retained for data derived from NAD27, but renamed the ""U.S. survey foot"" to distinguish it from the international foot. The exact length of the land mile varied slightly among English-speaking countries until the international yard and pound agreement in 1959 established the yard as exactly 0.9144 metres, giving a mile exactly 1,609.344 metres. The U.S. adopted this international mile for most purposes, but retained the pre-1959 mile for some land-survey data,"
"Nautical mile A nautical mile (also known as an air mile) is a unit of measurement defined as exactly . Historically, it was defined as one minute of latitude, which is one sixtieth of a degree of latitude – i.e. since a minute of a degree is x = , the Earth's polar circumference is approximately 21,600 nautical miles. It is a non-SI unit which today has a continued use in both air and marine navigation, and for the definition of territorial waters. There is no single internationally agreed symbol. While using M itself, the International Bureau of Weights and"
"length (inch, foot, yard and international mile) were the same in the US, though the US rarely uses some of the intermediate units, such as the (surveyor's) chain (22 yards) and the furlong (220 yards). At one time the definition of the nautical mile was based on the sphere whose surface is the same as the Clarke Ellipsoid. In the US, the full value of 1853.256 metres was used, but in the Commonwealth, this was rounded to 6080 feet (1853.184 m). These have been replaced by the international version, which rounds the sixtieth part of the 45° to the nearest"
"him an inch and he'll take a mile"" and ""Give him an inch and he'll take a yard"". Inch The inch (abbreviation: in or ″) is a unit of length in the (British) imperial and United States customary systems of measurement. It is equal to yard or of a foot. Derived from the Roman uncia (""twelfth""), the word ""inch"" is also sometimes used to translate similar units in other measurement systems, usually understood as deriving from the width of the human thumb. Standards for the exact length of an inch have varied in the past, but since the adoption of"
") is known as the geographical mile. Nautical mile A nautical mile (also known as an air mile) is a unit of measurement defined as exactly . Historically, it was defined as one minute of latitude, which is one sixtieth of a degree of latitude – i.e. since a minute of a degree is x = , the Earth's polar circumference is approximately 21,600 nautical miles. It is a non-SI unit which today has a continued use in both air and marine navigation, and for the definition of territorial waters. There is no single internationally agreed symbol. While using M"
"shorter; however, it is still colloquially referred to as ""the mile""). The 1600 meters is the official distance for this range of races in US high schools. While this race is rarely run outside high school and collegiate invitational competition, it has been held at the international level. The 1500 m, however, is the most common distance run at the college and international levels. The final leg of a distance medley relay is 1600 metres. An accurate way to run an actual mile on a metric track is to run the additional 9.344 meters before starting the first marked 400"
"maps at 1:50000 scale. Personally seen on the Punjab but assumed to be used in the whole of India. ""Conversion"" 1 Inch = Span of 6 Barley corns side by side by thickness, although barleycorns are not a reliable standard of measurement.<br> 1 Inch = 2.54 centimetres<br> 1 Foot = 30.48 cm<br> 1 Yard = 0.914 metre<br> 1 Mile = 1.61 Kilometre 1 coss= 2000 yards Indian units of measurement Before the introduction of the Metric system, one may divide the history of Indian systems of measurement into three main periods: the pre-Akbar's period, the period of the Akbar system,"
"mile, but until the early nineteenth century the Scottish and Irish customary miles were longer than the statute mile; consequently a Scots chain was about 74 (imperial) feet, an Irish chain 84 feet. These longer chains became obsolete following the adoption of the imperial system in 1824. This unit ceased to be permitted to be ""used for trade"" in 1985. The UK statute chain is 22 yards []. Until the Weights and Measures Act 1985, this length was a formal unit of statute measure in the United Kingdom. One link is a hundredth part of a chain, so is ."
"angular mil subtends approximately one metre at a distance of one kilometer. Imperial Russia used a system derived by dividing the circumference of a circle into chords of the same length as the radius. Each of these was divided into 100 spaces, giving a circle of 600. The Soviet Union divided these into tenths to give a circle of 6000 units, usually translated as ""mils"". This system was adopted by the former Warsaw Pact countries (e.g. Soviet Union, East Germany), often counterclockwise (see picture of wrist compass). This is still in use in Russia. Because the Earth's magnetic field's inclination"
"formula_133 miles, a difference of 9.4 cm (3.7 in). As discovered by Randall Munroe, a cubic mile is close to formula_134 cubic kilometers (within 0.5%). This means that a sphere with radius ""n"" kilometers has almost exactly the same volume as a cube with sides length ""n"" miles. The multiplier to convert from meters per second to miles per hour is formula_135. Accurate to within 0.04%. As a result, a 1 gram object moving at 100 miles per hour has almost exactly 1 joule of kinetic energy. One furlong per fortnight is close to one centimetre per minute, to within"
"≈ 0.2908 mil. This means that an object which spans 1 mil on the reticle is at a range that is in meters equal to the object's size in millimeters (e.g. an object of 100 mm @ 1 mrad is 100 meters away). So there is no conversion factor required, contrary to the MOA system. A reticle with markings (hashes or dots) spaced with a one mil apart (or a fraction of a mil) are collectively called a mil reticle. If the markings are round they are called mil-dots. In the table below conversions from mil to metric values are"
"leading to serious complications in trade, taxation, etc. Around the year 1300, by royal decree England standardized a long list of measures. Among the important units of distance and length at the time were the foot, yard, rod (or pole), furlong, and the mile. The rod was defined as yards or feet, and the mile was eight furlongs, so the definition of the furlong became 40 rods and that of the mile became 5,280 feet (eight furlongs/mile times 40 rods/furlong times feet/rod). A description from 1675 states, ""Dimensurator or Measuring Instrument whereof the mosts usual has been the Chain, and"
"mil dot spacing change. The USMC standard is that 1 mil (that is, 1 milliradian) equals 3.438 MOA (minute of arc, or, equivalently, minute of angle), while the US Army standard is 3.6 MOA, chosen so as to give a diameter of 1 yard at a distance of 1,000 yards (or equivalently, a diameter of 1 meter at a range of 1 kilometer.) Many commercial manufacturers use 3.5, splitting the difference, since it is easier to work with. It is important to note that angular mil (""mil"") is only an approximation of a milliradian and different organizations use different approximations."
"(~296 mm) was divided into both 12 ""unciae"" (inches) (~24.7 mm) and 16 digits (~18.5 mm). The Romans also introduced the ""mille passus"" (1000 paces) or double steps, the pace being equal to five Roman feet (~1480 mm). The Roman mile of 5000 feet (1480 m) was introduced into England during the occupation. Queen Elizabeth I (reigned from 1558 to 1603) changed, by statute, the mile to 5280 feet (~1609 m) or 8 furlongs, a furlong being 40 rod (unit)s (~201 m) of 5.5 yards (~5.03 m) each. The introduction of the yard (0.9144 m) as a unit of length"
"a ""mil"" (Scandinavian mile) is informally equal to 10 km, and this has continued to be the predominantly used unit in conversation when referring to geographical distances. In the 19th century, Switzerland had a non-metric system completely based on metric terms (e.g. 1 ""Fuss"" (foot) = 30 cm, 1 ""Zoll"" (inch) = 3 cm, 1 ""Linie"" (line) = 3 mm). In China, the ""jin"" now has a value of 500 g and the liang is 50 g. It is difficult to judge the degree to which ordinary people change to using metric in their daily lives. In countries that have"
"Millimetre The millimetre (International spelling as used by the International Bureau of Weights and Measures; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. Therefore, there are one thousand millimetres in a metre. There are ten millimetres in a centimetre. One millimetre is equal to micrometres or nanometres. A millimetre is equal to exactly (approximately 0.039370) of an inch. Since 1983, the metre has been defined as ""the length of the path travelled by light in vacuum"
"1 sea mile"", followed by ""For most practical purposes distance is measured from the latitude scale, assuming that one minute of latitude equals one nautical mile"". One tenth of a nautical mile is a cable length. The derived unit of speed is the knot, defined as one nautical mile per hour. The metre was originally defined as of the meridian arc from the North pole to the equator passing through Dunkirk. The Earth’s circumference is therefore approximately 40,000 km. The equatorial circumference is slightly longer than the polar circumference – the measurement based on this (40,075.017 km x x ="
"Li (unit) The li (, ""lǐ"", or , ""shìlǐ""), also known as the Chinese mile, is a traditional Chinese unit of distance. The li has varied considerably over time but was usually about a third as long as the English mile and now has a standardized length of a half-kilometer (). This is then divided into 1,500 chi or ""Chinese feet"". The character 里 combines the characters for ""field"" (田, ""tián"") and ""earth"" (土, ""tǔ""), since it was considered to be about the length of a single village. As late as the 1940s, a ""li"" did not represent a fixed"
"of latitude and the convenience of using the latitude scale on a map for distance measuring. The data mile is used in radar-related subjects and is equal to 6,000 feet (1.8288 kilometres). The radar mile is a unit of time (in the same way that the light year is a unit of distance), equal to the time required for a radar pulse to travel a distance of two miles (one mile each way). Thus, the radar statute mile is 10.8 μs and the radar nautical mile is 12.4 μs. The geographical mile is based upon the length of a meridian"
"long multiplication by 1,760 to convert miles to yards, the result is 22,880 yards. Carry this to the top of the yards column and add it to the 600 yards in the dividend giving 23,480. Long division of 23,480 / 37 now proceeds as normal yielding 634 with remainder 22. The remainder is multiplied by 3 to get feet and carried up to the feet column. Long division of the feet gives 1 remainder 29 which is then multiplied by twelve to get 348 inches. Long division continues with the final remainder of 15 inches being shown on the result"
"meters. In the U.S., the Mendenhall Order of 1893 tied the length of the U.S. yard to the meter, with the equivalence 39.37 inches = 1 meter, or approximately 0.914 401 828 803 658 meters per yard. In 1959, the international yard and pound agreement established the ""international"" yard length of 0.9144 meters, upon which both the customary U.S. and imperial units of length have since been based. 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"
"the ellipsoid varies with latitude, being the longest at the pole and the shortest at the equator as is the nautical mile. A metre was originally defined as the 10-millionth part of the length from equator to North Pole along the meridian through Paris (the target was not quite reached in actual implementation, so that is off by 200 ppm in the current definitions). This means that one kilometre is roughly equal to (1/40,000) * 360 * 60 meridional minutes of arc, which equals 0.54 nautical mile, though this is not exact because the two units are defined on different"
"Yard The yard (abbreviation: yd) is an English unit of length, in both the British imperial and US customary systems of measurement, that comprises 3 feet or 36 inches. Since 1959 it is by international agreement standardized as exactly 0.9144 meters. The name derives from the Old English ', ', &c., which was used for branches, staves, and measuring rods. It is first attested in the late-7th century laws of Ine of Wessex, where the ""yard of land"" mentioned is the yardland, an old English unit of tax assessment equal to hide. Around the same time, the Lindisfarne Gospels account"