code: public void setCenterPosition(GeoPosition geoPosition)
      {
          GeoPosition oldVal = getCenterPosition();
          setCenter(getTileFactory().geoToPixel(geoPosition, zoomLevel));
          repaint();
          GeoPosition newVal = getCenterPosition();
          firePropertyChange("centerPosition", oldVal, newVal);
      }
docs: A property indicating the center position of the map
  @param geoPosition the new property value