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  2. Longitude - Wikipedia

    en.wikipedia.org/wiki/Longitude

    Each degree of longitude is sub-divided into 60 minutes, each of which is divided into 60 seconds. A longitude is thus specified in sexagesimal notation as, for example, 23° 27′ 30″ E. For higher precision, the seconds are specified with a decimal fraction. An alternative representation uses degrees and minutes, and parts of a minute are ...

  3. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    In the mid-1960s, to defeat the advantage of the recently introduced computers for the then popular rally racing in the Midwest, competition lag times in a few events were given in centids (1100 day, 864 seconds, 14.4 minutes), millids (1 ⁄ 1,000 day, 86.4 seconds), and centims (1100 minute, 0.6 seconds) the latter two looking and ...

  4. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    The most common adjustment value in mrad based scopes is ⁠ 1 / 10 ⁠ mrad (which approximates 13 MOA). To adjust a ⁠ 1 / 10 ⁠ mrad scope 0.9 mrad down and 0.4 mrad right, the scope needs to be adjusted 9 clicks down and 4 clicks right (which equals approximately 3 and 1.5 MOA respectively).

  5. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    A common adjustment value in firearm sights is 1 cm at 100 meters which equals ⁠ 10 mm / 100 m ⁠ = ⁠ 1 / 10 ⁠ mrad. The true definition of a milliradian is based on a unit circle with a radius of one and an arc divided into 1,000 mrad per radian, hence 2,000 π or approximately 6,283.185 milliradians in one turn , and rifle scope ...

  6. Angular diameter - Wikipedia

    en.wikipedia.org/wiki/Angular_diameter

    5°20 ′ by 3°5 ′ Andromeda Galaxy: 3°10 ′ by 1° About six times the size of the Sun or the Moon. Only the much smaller core is visible without long-exposure photography. Charon (from the surface of Pluto) 3°9’ Veil Nebula: 3° Heart Nebula: 2.5° by 2.5° Westerhout 5: 2.3° by 1.25° Sh2-54: 2.3° Carina Nebula: 2° by 2°

  7. Spanish units of measurement - Wikipedia

    en.wikipedia.org/wiki/Spanish_units_of_measurement

    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 835.905 mm (32.91 in) in 1801. [citation needed] In Argentina, the vara measured about 866 mm (34.1 in), and typical urban lots are 8.66 m (28.41 ft) wide (10 Argentine varas). At some time a value of 33 inches ...

  8. Degree (angle) - Wikipedia

    en.wikipedia.org/wiki/Degree_(angle)

    With the invention of the metric system, based on powers of ten, there was an attempt to replace degrees by decimal "degrees" in France and nearby countries, [note 3] where the number in a right angle is equal to 100 gon with 400 gon in a full circle (1° = 109 gon).

  9. Geographic coordinate conversion - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate...

    degrees and decimal minutes: 40° 26.767′ N 79° 58.933′ W; decimal degrees: +40.446 -79.982; There are 60 minutes in a degree and 60 seconds in a minute. Therefore, to convert from a degrees minutes seconds format to a decimal degrees format, one may use the formula