queueing_tool/graph/graph_functions.py
def _calculate_distance(latlon1, latlon2):
    """Calculates the distance between two points on earth.
    """
    lat1, lon1 = latlon1
    lat2, lon2 = latlon2
    dlon = lon2 - lon1
    dlat = lat2 - lat1
    R = 6371  # radius of the earth in kilometers
    a = np.sin(dlat / 2)**2 + np.cos(lat1) * np.cos(lat2) * (np.sin(dlon / 2))**2
    c = 2 * np.pi * R * np.arctan2(np.sqrt(a), np.sqrt(1 - a)) / 180
    return c
def _calculate_distance(latlon1, latlon2):
    """Calculates the distance between two points on earth.
    """
    lat1, lon1 = latlon1
    lat2, lon2 = latlon2
    dlon = lon2 - lon1
    dlat = lat2 - lat1
    R = 6371  # radius of the earth in kilometers
    a = np.sin(dlat / 2)**2 + np.cos(lat1) * np.cos(lat2) * (np.sin(dlon / 2))**2
    c = 2 * np.pi * R * np.arctan2(np.sqrt(a), np.sqrt(1 - a)) / 180
    return c
Calculates the distance between two points on earth.