function deg2rad(deg) {
  return deg * (Math.PI/180)
}


function getDistanceFromLatLonInMeter(lat1, lon1, lat2, lon2) {

  var R = 6371;
  var dLat = deg2rad(lat2-lat1);
  var dLon = deg2rad(lon2-lon1);
  var a = Math.sin(dLat/2) * Math.sin(dLat/2) + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.sin(dLon/2) * Math.sin(dLon/2);
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
  var d = R * c;
  return d*1000;

}


//EXAMPLE
getDistanceFromLatLonInMeter(lat1,long1,lat2,long2);
// xxxx METER