Distance between two places on the earth Calculator

Calculates the distance and azimuth between two places from latitudes and longitudes.

Calculation assumes that the Earth is a sphere with a radius of 6378km.
Input negative degree for west longtitude and south latitude.
Distance between two places on the earth
A: Longitude
    1. Latitude
B: Longitude
    1. Latitude
    1. [ Earth's radius r
    2. km ]

Compass from A to B

place A(x1, y1)、place B(x2, y2)
    Distance between two places on the earth
    [1-10] /41Disp-Num
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    [1]  2020/09/10 18:26   Male / 20 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    Baseline distance for lunar parallax calculation
    [2]  2020/09/01 06:33   Female / 30 years old level / Others / Useful /
    Purpose of use
    Son asked how far away his aunt lives. 7000 km!
    [3]  2020/08/31 00:03   Female / 30 years old level / Others / Useful /
    Purpose of use
    I wanted to see how far away I lived from my mother - over 9000km.
    [4]  2020/08/09 21:57   Male / 60 years old level or over / A retired person / Very /
    Purpose of use
    Wanted to find the distance between two geocaching points.
    [5]  2020/07/22 03:56   Male / 20 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    Calculate trajectory needed to catapult my girlfriend from Chicago, IL to St. Louis, MO.
    [6]  2020/07/07 07:18   Male / 20 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    Seeing how far is my love ! T.T
    [7]  2020/06/22 17:43   Male / 20 years old level / An engineer / Useful /
    Purpose of use
    To test our own implementation of calculation distance
    [8]  2020/06/16 02:27   Male / 30 years old level / An engineer / Very /
    Purpose of use
    compare result of distance computation part of application software to be developed.
    [9]  2020/05/22 11:03   Female / 60 years old level or over / Others / Very /
    Purpose of use
    Signposts
    Comment/Request
    Would love to have an additional opposite direction distance and reckoning. thanks.
    [10]  2020/05/21 03:02   Male / 60 years old level or over / An office worker / A public employee / Very /
    Purpose of use
    Make a signpost showing direction of various places from point of origin

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