For those interested in this topic, and its potential, I have add some more information to my web site page:
including some related trigonometry and notes on the vertical separation of the panoramas as well as horizontal.
Hugh ... all I can say is "WOW!" ... and I need to talk to my Engineering friends again.
I am planning to put a post on the LinkedIn Photogrammetry group in the hope that we can find some talented people willing to take up the challenge of creating the software tools to make quantitative data extraction from spherical panoramas an automated process.