Naming convention: tuning sequence vs string numbers?

Hey Jim, over the years you have really helped me get my mind straight in terms of nomenclature and using the correct enharmonic name for a key. I have one specific question that relates to gravity versus pitch. When discussing a scale, for example the B Phrygian Dominant which spans the 11th frets to the 16th fret, I will often refer to the top or the bottom of the scale. But what is the "top"? Is the top of the scale the 11th fret or the 16th fret? I ask because I want to speak in a way that other musicians will find it relatable and correct.

I would say that the highest sounding note is the top, but I'm not an authority. As long as you and whoever you're talking to both agree.
 
I came across this same kind of "backward" naming convention working on moped engine. Took me awhile to get that going one direction on a throttle needle was up and one was down. It just seemed backwards to me.
 
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