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  2. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    This article gives a list of conversion factors for several physical ... ≈ 0.304 799 47 m: foot (US Survey) ft (US) ... (US Survey) mi ≡ 5280 US Survey feet ≡ ...

  3. State Plane Coordinate System - Wikipedia

    en.wikipedia.org/wiki/State_Plane_Coordinate_System

    These efforts are known as "High Accuracy Reference Network" (HARN) or "High Precision GPS Network" (HPGN). In addition, the basic unit of distance used is sometimes feet and sometimes meters. Thus a fully described coordinate system often looks something like: "Washington State Plane North, NAD83 HARN, US Survey feet".

  4. North American Datum - Wikipedia

    en.wikipedia.org/wiki/North_American_Datum

    These are the defining dimensions for NAD 27, but Clarke actually defined his 1866 spheroid as a = 20,926,062 British feet, b = 20,855,121 British feet. The conversion to meters uses Clarke's 1865 inch-meter ratio of 39.370432. The length of a foot or meter at the time could not practically be benchmarked to better than about 0.02 mm. [11]

  5. Mexican units of measurement - Wikipedia

    en.wikipedia.org/wiki/Mexican_units_of_measurement

    A number of units were used. One fanega was equal to 35 662.8 m 2 as it was legally defined. [1] Some other units and legal equivalents are given below: 1 caballeria = 12 fanegas 1 labor = 18 fanegas 1 sitio = 492.28 fanegas. [1] [3]

  6. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    United States customary units form a system of measurement units commonly used in the United States and most U.S. territories [1] since being standardized and adopted in 1832. [2] The United States customary system developed from English units that were in use in the British Empire before the U.S. became an independent country.

  7. Rod (unit) - Wikipedia

    en.wikipedia.org/wiki/Rod_(unit)

    The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.

  8. Abiquiú Lake to host annual midwinter eagle survey on Jan. 6

    www.aol.com/news/abiqui-lake-host-annual...

    Dec. 26—The U.S. Army Corps of Engineers is calling all those with an eagle eye. From 9 a.m. to noon Saturday, Jan. 6, the Corps staff at Abiquiú Lake will host its annual midwinter eagle survey.

  9. Spanish units of measurement - Wikipedia

    en.wikipedia.org/wiki/Spanish_units_of_measurement

    Varas are a surveying unit that appear in many deeds in the southern United States due to them previously being part of Mexico, they became part of the United States due to the Treaty of Guadalupe Hidalgo. Varas were also used in many parts of Latin America. It varied in size at various times and places; the Spanish unit was set at about 835. ...