I'm facinated by the pursuit of ultimate sharpness and will soon be sanding convex edges onto most of the blades in the house.

Trying to resharpen a convex edge with a sharpening stick or stone in the field, and stroping it on my belt, would likely make a mess of it.
I will select a good knife for the vehicle's emergency kit.
The scenario where this knife gets used doesn't allow for touch ups on a sander.

So, what's the appropriate edge geometry for a knife that has the constraint of being field servicable?