title: ElasticSearch geo-database: geo_distance filter returns geo pins in ellipse not in circle
body: <p>i have elasticsearch database of geo objects.
  I want to search the nearest objects around some <code>geo_point</code> in custom distance and then display them on google map.
  using default elasticsearch filters - <code>geo_distance</code> filter, it works fine, but the problem is that returned pins are in eliptical range, not in circular range (as usually when you search anything in X km RADIUS) maybe screenshots would help to understand. </p>
  
  <p>I don't know where the problem can be, google maps only takes the result that elastic returns - set of pins to display</p>
  
  <p>Does anybody know anything about this issue?</p>
  
  <p><img src="https://i.stack.imgur.com/eWY5m.jpg" alt="map without filtering"></p>
  
  <p><img src="https://i.stack.imgur.com/2lSpC.jpg" alt="filtered map, the red circle shows actual border of searching"></p>