Today's...

Elevation ... 554 ft away? Hope you know the refraction value really well.

Reminds me of the time I got to locate the center of the Texas star, directly below the center of the rotunda, inside the state capitol. That was a "fun" day.

@bill93 

funny thing...I saw that shift from outside to inside of the building and it added the 0.02 to 0.04 hundredths I saw in the shot, not much I can do about the 20 to 30 degree temp change and density except for run a level loop, and I will be considering it since I found a plausible loop that can be easily run to confirm that issue and resolve. stupid physics...  

When a measurement is critical, checking by another means is a wise endeavor.  

@cv 

and well I sure as hell can't use GPS regardless of how expensive it is either....  

levels are in the background of all great things survey related.

@squirl 

My last shot to an indoor location was to the back wall of a bathroom in a commercial building.  A building on the square in Fredonia.  Was hoping to find that a common wall (brick) was running straight from the front to the alley.  It did, thankfully.

Not nearly so noteworthy as your adventure.

Not nearly so noteworthy as your adventure.

But an adventure nonetheless