The above Visual Aid is NOT the same illustration. The goldish colored line above has been radically Relocated/Moved vs the original illustration that was posted. If there was an Error of some sort in the original Visual Aid posted by Bill, all he has to do is state such. Until stating such, his posted illustration Clearly displays the gold line/a shot being fired from the Dal Tex Bld from a ground level position.
The visual aid is Bill's posted illustration, ie, the exact same illustration with a new extended line drawn straight over the original line to make the trajectory line clearer.
I have made this more visually simpler for you to see, and to try try to comprehend.
No need to apologise for your faulty analysis and criticisms.