The mile (sometimes described as the land or statute mile, to distinguish it from the Nautical mile) is a subsidiary unit of length in the British Imperial system, defined as 1760 yards. The British Imperial system of units was established on June 17, 1824, by the Weights and Measures Act. Strictly speaking, it is not correct to use the term British Imperial for units in use before that date, and they are better described as traditional British. In this system, the standard yard had a length of 0.914398416 m, making the mile equal to 1609.34121216 m. (Cardarelli gives a value of 0.91443992 m, but this is in error.) For the detailed history of this yard, see Yard (British Imperial).