Return the current camera position.
The callback function will be involved with current camera position as CameraPosition data.
map.getCameraPosition(function(camera) {
var buff = ["Current camera position:\n",
"latitude:" + camera.target.lat,
"longitude:" + camera.target.lng,
"zoom:" + camera.zoom,
"tilt:" + camera.tilt,
"bearing:" + camera.bearing].join("\n");
alert(buff);
});