Comparing Other Site photos
Aside from the actual site images contained in the PG Film itself, there were other photos of the Bluff
Creek site taken in subsequent years by other investigators. Byrne and Dahinden visited the site and took pictures which are available
to researchers.
Comparing the digital site model of mine to these photos is a different procedure, because we do not know the
camera, lens, or original film image format, whether the image we have has been cropped, etc. But if the location of the camera can
be found, and a digital picture (a render) of the digital model is made with simply a wider field of view than the trees and objects
seen in the research photo, we can test to see if the digital trees and objects align with the photo trees and objects, in a position
and proportional size comparison. If there is an alignment, this lends further credibility to the accuracy of the digital model.
For
the two photos compared, I have included a data sheet (below) listing the camera position and rotation coordinates used to produce
the digital render. These coordinates give us a fine proximate camera position for the people who took these photos on the real site.
In the digital renders, there are additional gray cylinders for trees in the north rim section of the site. These trees have
not yet been fixed in a final position, and have not yet been identified. They are simply additional trees that the continuing effort
will try to confirm location of, in the final site model and diagram which will be released in subsequent months with the final report
release.