Precise Digital Exposure

The Basis Is Per Ansel Adams
ETTR gives a correct exposure for optimum color and tonal densities, and the reason was as explained by Michael Reichmann in the article Expose (to the) Right in 2003. Most of us apply ETTR per that method by applying averaged or matrix metering with exposure compensation. Our departure point is thus an averaged exposure, and we make an exposure compensation for what we know works for a typical scene and tweak it for other scenes (trial and error).
A recent article on Luminous-Landscape titled Optimum Exposure presents essentially nothing new. A publication titled Perfect Exposure on my website dates from 2011 and was reviewed by Michael Reichman at the time. It points out both the simplified concept to upon one single spot meter reading determine exposure for precise location of the latitude of a sensor compared to a scene, and much more. For correctness this all dates back to what Ansel Adams wrote relating to the Zone System and how to determine spot me...