Yotsuya,
There are other images. Some of them are visible in the composite I posted.
The image you just posted has a bit of distortion which is easy to quantify. Look at the line near the bottom of the frame. This is a dimensional callout. By nature and function, this line was perfectly straight on the drawing. You'll notice that it curves just at the same point where the "guppy belly" seems to be drawn into the hull. Both lines are being distorted by the same amount. The curve is indeed there, but it is less than the image would seem to indicate. Look at that same line in my image. It is a straight baseline. Take the secondary hull from my composite and mirror it as a separate layer. Align the center line. You will find the hull is symmetrical. When you harmonize this image with several others, you end up with a much truer idea of the intended geometry.
M.
I'm quite familiar with extracting plans from photos. There are lots of fun variables. A couple of times I've had a poor quality scan and higher quality photos. I was able to up Richard Taylors Refit Enterprise drawings that way. The last one was one of the set plans for TOS. Badly folded so I had to cut it up. But no one has scanned it yet so it was worth the effort.
The original plans of the Enterprise are gold in comparison. It would be cool to put all the pieces together that exist and align it over the common dimensions of the 33" and 11' models. Shaw did one like that, but it seems there are more pieces than he used.