title: Latitude,longitude and geographical quarter (NW, NE, SW, SE) from a center to a given point
body: <p>Considering latitude and longitude, I was looking for a way to know in which quarter is located a point from a given center.</p>
  
  <pre>
  NW             NE
    ......|......
    ..X...|......
    ......|......
    ------x------
    ......|......
    ......|......
    ......|......
  SW             SE
  </pre>