The starting point for a verified view for architectural photo-montages is the photographic image. Verified photography requires careful planning and execution. I make high resolution images from each requested viewpoint. Within the metadata of the image the Latitude, Longitude, elevation heading, vertical position, lens focal length and sensor info are all recorded and the image. Image naming regime as an example is : _PMC9226_view4_8bit_1418_030820_f11_48mm_8256x5504 so Image file number - view number - 8 or 16bit colour depth - time - date-aperture - focal length of lens used - image sensor size. The heading information is recorded in the file info in the metadata as for example : Image Direction: 85º E.. If a perspective control lens has been used then the degree of movement is also recorded.