Possible to automatically compensate for irreguarities on the XY plane?

@ andy

Just out of interest:

it would not be too unmanageable to pass a set of XYZ probe points in as a parameter array (max 4096 characters)

I guess this would not be enough to pass 10'000 Z values (even if we could somehow use the array position to represent the xy position)?

On the other hand 'classicladder' seems to manage to load fairly substantial 'clp' files. But I assume that is not kept in shared memory?

I think that the trick would be to load a C strict with the X and Y axis breakpoints and an array of Z heights.

If you were probing a part for engraving then the X breakpoints might be
0, 100, 105, 110, 115, 120, 125, 130, 400
2D interpolation of such a map is something that vehicle ECUs do millions of times a second, and it's pretty simple code.

So the realtime part is simple.

Is this similar to 3D printing bed mesh?
There is something like that done here, one for circuit boards, the other for printers.
Sorry, no time to find those.
Edit:
search google with something like
bed leveling site:linuxcnc.org
or
bed compensation site:linuxcnc.org
This shows results only from this forum and LinuxCNC website and wiki.