If you need information on the design and lay-out of a particular yard or part of the US to model this may be of some help. The attached picture is not magnified as large as it could be so the details are not as clear. I found my house and could make out the garage and the cars in the drive.
Here is the link: http://terraserver.homeadvisor.msn.com/
Here is the link: http://terraserver.homeadvisor.msn.com/