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] /27Disp-Num
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    [1]  2019/09/18 06:38   Male / 50 years old level / An office worker / A public employee / Very /
    Purpose of use
    In an online discussion about the feasibility of a Bering Strait bridge or tunnel, measuring the distance between the two settlements of any size on either side closest to one another.
    Comment/Request
    A way to more easily paste coordinates from Google Maps would be nice, but not necessary.
    [2]  2019/08/22 07:12   Female / 20 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    To test workings whilst I study for exam.
    [3]  2019/07/18 09:15   Male / 20 years old level / A teacher / A researcher / Useful /
    Purpose of use
    To test if Google Maps accounts for curvature when measuring distances.
    [4]  2019/06/27 19:34   Male / 30 years old level / An engineer / Useful /
    Purpose of use
    Writing a software that uses GPS and confirming my calculations
    [5]  2019/06/13 05:01   Male / 20 years old level / An office worker / A public employee / Useful /
    Purpose of use
    To beat a friend in an argument
    [6]  2019/05/11 08:13   Male / 30 years old level / Others / Very /
    Purpose of use
    Determining the draft order for my fantasy football league by having people pick any city in the world, then using random.org to generate a random coordinate. Draft order is assigned based on each city's distance from that coordinate.
    [7]  2019/05/07 21:36   Female / 20 years old level / An engineer / Very /
    Purpose of use
    see how far away the northernmost point of the european electric grid is from the northernmost point of the north american electric grid
    [8]  2019/03/22 23:37   Male / 50 years old level / Self-employed people / Very /
    Purpose of use
    Hobby
    Comment/Request
    Why does the compass not point exactly due east or due west when I choose the same latitude from point A to point B near the Equator?
    [9]  2019/03/19 06:59   Male / 40 years old level / Others / Very /
    Purpose of use
    I wanted to be able to tell someone "You are literally 10 thousand miles away!" ...and actually know what I was talking about. Now I can do that. So....bragging rights? ;)
    [10]  2019/01/20 21:05   Male / 40 years old level / A teacher / A researcher / Very /
    Purpose of use
    Wanted to compare the distance between extreme points (N/S) of two countries.
    Comment/Request
    Great public service and easy to use (but had to transform degrees/minutes/seconds into decimals myself).

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