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Tina Müller 2016-12-05 23:44:36 +01:00
parent 9dc3c2bb62
commit bba7bfd280
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Task/Haversine-formula/Ring/haversine-formula.ring Normal file
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decimals(8)
see haversine(36.12, -86.67, 33.94, -118.4) + nl
func haversine x1, y1, x2, y2
r=0.01745
x1= x1*r
x2= x2*r
y1= y1*r
y2= y2*r
dy = y2-y1
dx = x2-x1
a = pow(sin(dx/2),2) + cos(x1) * cos(x2) * pow(sin(dy/2),2)
c = 2 * asin(sqrt(a))
d = 6372.8 * c
return d