18 lines
454 B
Ruby
18 lines
454 B
Ruby
include Math
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Radius = 6371 # rough radius of the Earth, in kilometers
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def spherical_distance(start_coords, end_coords)
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lat1, long1 = deg2rad *start_coords
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lat2, long2 = deg2rad *end_coords
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2 * Radius * asin(sqrt(sin((lat2-lat1)/2)**2 + cos(lat1) * cos(lat2) * sin((long2 - long1)/2)**2))
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end
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def deg2rad(lat, long)
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[lat * PI / 180, long * PI / 180]
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end
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bna = [36.12, -86.67]
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lax = [33.94, -118.4]
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puts "%.1f" % spherical_distance(bna, lax)
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