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.
A: Longitude
 Latitude
B: Longitude
 Latitude
 [ Earth's radius r km ]

 Distance d km
 Azimuth φ ° =
 Compass from A to B
 place A(x1, y1)、place B(x2, y2)$\normal\\\hspace{10}d=rcos^{\tiny -1}(siny_{\tiny 1}siny__{\tiny 2}+cosy__{\tiny 1}cosy__{\tiny 2}cos\Delta x)\\\phi=90-atan2(sin\Delta x,\ cosy_{\tiny 1}tany_{\tiny 2}-siny_{\tiny 1}cos\Delta x)\\\hspace{30}\Delta x=x_{\tiny 2}-x_{\tiny 1}$

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