old_contents: //http://en.wikipedia.org/wiki/Vincenty%27s_formulae
  //http://www.movable-type.co.uk/scripts/latlong-vincenty.html#inverse
new_contents: //http://en.wikipedia.org/wiki/Vincenty%27s_formulae
  //http://www.movable-type.co.uk/scripts/latlong-vincenty.html#inverse
  
  
  
  function toRad(degree) {
   return degree * Math.PI / 180;
  };
  function toDeg(radian) {
   return radian * 180 / Math.PI;
  };
subject: add degree and radian functions