Dear KHunter,
Thank you for your detailed explanation. I will study it and try to use your method and come back to you later.
But maybe I forgot to give you this link to my important link, showing that I am not using Google Earth’s data (of which I agree are not accurate), I am using data coming from Land ID of which I import into Google Earth via KML file. Please have a look here:
Once you have download the KML file, simply double click it and Google Earth should launch automatically activating the heigh accuracy topographical Data.
One more time I would like to stress the fact that Gary in his video with his heigh accuracy drone, was able to find the exact some sea levels as with my method by using the KML file provided by Land ID. Using two different methods and finding the same result is a double check that confirms the sea levels that I am using are correct. One thing has to be mentioned however, Gary did not indicate the position of the stage, nor the bleachers, he only indicated building 6 and the fence, which was 100% in agreement with my measuring method. See my post here for verification:
So, I suggest, I take time to try to do your method and you take time to do mine and we get back shortly to share our findings? Sounds like a deal?