The following illustration is an example of what I am talking about:
The original photo of a girl (not my property)
http://eastcoastbands.com/gaeorig.jpg
And then the illustration I made:
http://eastcoastbands.com/gae.png
So this example uses a person. In practice I will be doing this using buildings and Google Street View.
It is likely that google copyrights its images and that your work would be considered a derivative, which is infringement. You might argue fair use or that it's not copyrightable because it's not creative enough, but that is likely a losing argument. Try getting your own non-infringing photos.