amites/center_geo.py

## center_geo.py
from math import cos, sin, atan2, sqrt

def center_geolocation(geolocations):
    """
    Provide a relatively accurate center lat, lon returned as a list pair, given
    a list of list pairs.
    ex: in: geolocations = ((lat1,lon1), (lat2,lon2),)
        out: (center_lat, center_lon)
    """
    x = 0
    y = 0
    z = 0

    for lat, lon in geolocations:
        lat = float(lat)
        lon = float(lon)
        x += cos(lat) * cos(lon)
        y += cos(lat) * sin(lon)
        z += sin(lat)

    x = float(x / len(geolocations))
    y = float(y / len(geolocations))
    z = float(z / len(geolocations))

    return (atan2(z, sqrt(x * x + y * y)), atan2(y, x))
	from math import cos, sin, atan2, sqrt

	def center_geolocation(geolocations):
	"""
	Provide a relatively accurate center lat, lon returned as a list pair, given
	a list of list pairs.
	ex: in: geolocations = ((lat1,lon1), (lat2,lon2),)
	out: (center_lat, center_lon)
	"""
	x = 0
	y = 0
	z = 0

	for lat, lon in geolocations:
	lat = float(lat)
	lon = float(lon)
	x += cos(lat) * cos(lon)
	y += cos(lat) * sin(lon)
	z += sin(lat)

	x = float(x / len(geolocations))
	y = float(y / len(geolocations))
	z = float(z / len(geolocations))

	return (atan2(z, sqrt(x * x + y * y)), atan2(y, x))