"Bravo8500" wrote in message
ups.com...
They all have nearest, but I've never seen one with steepest descent.

Huh? The steepest descent is the nearest airport. Even in mountainous
terrain, it's incredibly rare to find an airport uphill.

It may not be so trivial to provide steepest descent with no
obstructions on the path.

The original poster didn't stipulate "with no obstructions on the path".

I don't think the original question was intended to be nearly as
sophisticated and complicated as you seem to be making it.

Pete