Find out which sensitive locations are off-limits online. http://www.itsecurity.com/features/51-things-not-on-google-maps-071508/ The message is loud and clear Google maps: Trespassers Keep OFF
Lol, they mask a lot of objects on the Google maps, a lot of military objects especially in the USA and Iraq.
You just cant see them on there as its not possible, google need to actually scan an area for it to show, and there obviously not allowed in certain areas. That is my understanding of it anyway, you see google out in the cars doing all the streets etc with the cameras on vehicle.