static public String addMarker(int x,int y)
    {
        double lat = latitude - yToMap[zoomIndex]*y + imageSizeH/2*yToMap[zoomIndex];
        //double lat = 51.111565;
        double lon = longtitude + xToMap[zoomIndex]*x - imageSizeW/2*xToMap[zoomIndex];
        
        if(markers<20){
        markersArray[markers]=new Marker(lat,lon);
        markers++;}
        
        return Double.toString(lat)+","+Double.toString(lon);
    }