[nailer]

Thanks. Photoscan's worth checking out - there's a few people doing large spaces with drones, as well as the usual object scans you mention. See http://www.agisoft.com/community/showcase/ They've done churches, cliffs, and whole valleys before: http://www.theastronauts.com/2014/03/visual-revolution-vanis...

That said, Photoscan's UI is incredibly poor, and the software has bugs (particularly around CUDA) so I'd be interested in alternatives.

123D catch (from Autodesk) does cloud based processing like you guys.