Haversine formula - Exemplo de calculo de distância

gistfile1.py

import math

def distance(origin, destination):
    lat1, lon1 = origin
    lat2, lon2 = destination
    radius = 6371 # km

    dlat = math.radians(lat2-lat1)
    dlon = math.radians(lon2-lon1)
    a = math.sin(dlat/2) * math.sin(dlat/2) + math.cos(math.radians(lat1)) \
        * math.cos(math.radians(lat2)) * math.sin(dlon/2) * math.sin(dlon/2)
    c = 2 * math.atan2(math.sqrt(a), math.sqrt(1-a))
    d = radius * c

    return d
    
    
#EXEMPLO
>>> seattle = [47.621800, -122.350326]
>>> olympia = [47.041917, -122.893766]
>>> distance(seattle, olympia)
76.386615799548693
>>>