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This question already has an answer here:

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How is the returned error calculated?

I cannot find any information about this in the documentation of FindGeometricTransform.

It is only indicated:

"FindGeometricTransform returns an expression of the form {err,trfun}, where err is an estimate of the average alignment error, and trfun is a transformation function."

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marked as duplicate by Michael E2, m_goldberg, Henrik Schumacher, kirma, bbgodfrey Jan 15 at 5:23

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It is the mean Euclidean distance of the points after transformation.

{err, transform} = FindGeometricTransform[data2, data1];
err

0.315546

Mean@MapThread[EuclideanDistance, {transform@data1, data2}]

0.315546

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  • $\begingroup$ This is great. Form where did you find the information? $\endgroup$ – mrz Jan 9 at 22:02
  • $\begingroup$ I just worked it out. There were only so many ways it could be done, and mean euclidean distance seemed to make the most sense $\endgroup$ – Carl Lange Jan 9 at 22:19
  • $\begingroup$ I would be happy to get an additional comment regarding EuclideanDistance : in my question mathematica.stackexchange.com/questions/189124/… is a comment from me below Cesareos answer. What is your opinion about that? $\endgroup$ – mrz Jan 10 at 15:38
  • $\begingroup$ 4000 km??? Incredible. $\endgroup$ – mrz Jan 10 at 15:45
  • $\begingroup$ I'll answer your EuclideanDistance question on that question. Also, thanks a lot, it's really been an amazing project! Do check out toughsoles.ie if you're interested :) $\endgroup$ – Carl Lange Jan 10 at 18:05

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