Drawing a circle Google Static Maps

Question

I have a Google Maps Circle drawn on v3 api. When the user has plotted there circle (or polygon if they choose), they can save the data to the server. If the user has picked

Answer 1

python version, polyline library used for encoding the polygon

import math, polyline

def g_map_circle(lat,lng,radius,detail=8):
  points = []
  r = 6371
  pi = math.pi

  _lat = (lat * pi) /180
  _lng = (lng * pi) /180
  d = radius / r

  i = 0
  while i <= 360:
    i = i + detail
    brng = i * pi /180

    p_lat = math.asin(math.sin(_lat) * math.cos(d) + math.cos(_lat) * math.sin(d) * math.cos(brng));
    p_lng = (_lng + math.atan2(math.sin(brng) * math.sin(d) * math.cos(_lat), math.cos(d) - math.sin(_lat) * math.sin(p_lat))) * 180 / pi
    p_lat = (p_lat * 180) /pi
    points.append((p_lat,p_lng))

  return polyline.encode(points)