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  2. Geographic coordinate conversion - Wikipedia

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

    The formulas involved can be complex and in some cases, such as in the ECEF to geodetic conversion above, the conversion has no closed-form solution and approximate methods must be used. References such as the DMA Technical Manual 8358.1 [15] and the USGS paper Map Projections: A Working Manual [16] contain formulas for conversion of map ...

  3. Got Points or Miles? Here’s How to Use Your Credit Card ...

    www.aol.com/got-points-miles-credit-card...

    Points and miles can be used to book an entire vacation package, or just the flight. Depending on how many points you’ve accumulated, you can pay for flights, upgrade your seats, make onboard ...

  4. Vincenty's formulae - Wikipedia

    en.wikipedia.org/wiki/Vincenty's_formulae

    longitude of the points; L = L 2 − L 1: difference in longitude of two points; λ: Difference in longitude of the points on the auxiliary sphere; α 1, α 2: forward azimuths at the points; α: forward azimuth of the geodesic at the equator, if it were extended that far; s: ellipsoidal distance between the two points; σ: angular separation ...

  5. Frequent-flyer program - Wikipedia

    en.wikipedia.org/wiki/Frequent-flyer_program

    United MileagePlus cards. A frequent-flyer programme (FFP) is a loyalty program offered by an airline.. Many airlines have frequent-flyer programmes designed to encourage airline customers enrolled in the programme to accumulate points (also called miles, kilometres, or segments) which may then be redeemed for air travel or other rewards.

  6. Haversine formula - Wikipedia

    en.wikipedia.org/wiki/Haversine_formula

    The haversine formula determines the great-circle distance between two points on a sphere given their longitudes and latitudes. Important in navigation , it is a special case of a more general formula in spherical trigonometry , the law of haversines , that relates the sides and angles of spherical triangles.

  7. Template:Convert - Wikipedia

    en.wikipedia.org/wiki/Template:Convert

    By {{Convert}} default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the ...

  8. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.

  9. List of motorsports points scoring systems - Wikipedia

    en.wikipedia.org/wiki/List_of_motorsports_points...

    used only for events shorter than 200 miles between 1981 and 1982 [1] 20 16 14 12 10 8 6 5 4 3 2 1 - - - - - - - - 1986: 2001: American Racing Series / Indy Lights: 1 additional bonus point for pole position and most led laps 1999: 2002: Formula Atlantic: 1 additional bonus point for pole position and most led laps 1984: 1985: Deutsche ...