I am not exactly sure of the accuracy of the Photosynth technology, but I do know that it can be very accurate if done correctly.
I am suggesting the creation of site(s) to be made available for specific uses.
One example would be forensic investigation. This site would be accessible to other forensic investigators in much the same manner as fingerprinting and DNA information is available to only a specific group. I strongly believe, in the case of crime investigation, this would result in an additional investigative tool.
The same type of service could be offered to other non-commercial endeavors such as Archeology. This type of "separation" from the standard aesthetic synthing, could also be made available to groups with commercial interests.