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)

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