@Cary L Brown - I'm going to have to disagree with you about not being able to see the diagram clearly enough on screen as the top view gets a decent close-up in "The Enterprise Incident".
947' was the working size I had picked because that was as good as a place to start and I knew I might need to scale up from there. But up until "The Enterprise Incident", I had not considered it to be a number that can be derived.
I am attaching 947' size to only the "diagram version aka pre-Pike version". I'm still going to end up scaling the Series ship up to fit the flight deck and not because of interior set issues (which I have yet to find except for the flight deck).
Funny enough that you mention how would a Thermian know what the measurement for a foot would be... simple, use Miss Lincoln from "Assignment Earth" as the reference