X error (cm) - root mean square error for X coordinate for all the cameras.

Y error (cm) - root mean square error for Y coordinate for all the cameras.

Z error (cm) - root mean square error for Z coordinate for all the cameras.

this three sections contains negative result in GCPs, is that correct?

it is interesting that the total RMSE remain positive result.

another question: Total (cm): 15 and Image (pix): 0.6, is it good result for GCPs?