map.setZoom(12);
// ground overlay
GLatLngBounds boundaries = new GLatLngBounds(new GLatLng(40.716216, -74.213393), new GLatLng(40.765641, -74.139235));
GGroundOverlay oldmap = new GGroundOverlay("http://www.lib.utexas.edu/maps/historical/newark_nj_1922.jpg", boundaries);
map.addOverlay(oldmap);
add(map);
}