Nolhagaskolan.
Raw height data, deliberately nudged out of place, then pulled back into line.
Left is the height model. Middle is the error after I damaged it. Right is xDEM finding the offset and killing the residual.
The close-up is the same mistake with sharper teeth: red and cyan split, yellow stacks.
Two pixels, three pixels, 1.75 meters.
Tiny numbers. Visibly not tiny.
