I Believe these are local space, in relation ship to the root. i.e. 142 px away from root x 256px away from root's y. (could be wrong, don't have access to any runtime atm)
I am unsure what you mean by standard square?
NOTE: I think we did some magic with the world transforms, so these results may differ
Yup, I was correct, the bone positions are in local space... I.E. The x,y values are the same as what you see in the spine editor.
You will need to calculate what it's position should be in world space, if you wanted/need to manipulate it like that 🙂