public void enlargeByMetres(double metres){
  double latMargin=metres / 110852.0;
  double lngMargin=metres / (110852.0 * Math.abs(Math.cos(LatLong.radians * lat1)));
  lat1-=latMargin;
  lat2+=latMargin;
  lng1-=lngMargin;
  lng2+=lngMargin;
}

public void enlargeByMetres ( double metres ) { double latMargin = metres / 110852.0 ; double lngMargin = metres / ( 110852.0 * Math . abs ( Math . cos ( LatLong . radians * lat1 ) ) ) ; lat1 -= latMargin ; lat2 += latMargin ; lng1 -= lngMargin ; lng2 += lngMargin ; }
e . g . scale = 0 . 1 means increase the size by 10 % on all sides .
