I'm looking for some starting points to implement an algorithm to calculate Helmert Transformation parameters (4- and/or 7-parameter). I found already some basic implementation e.g. https://github.com/rstulug/Helmert_transformation. Currently I'm not quite sure how to deal with remaining errors after the least square fit.

closed as off-topic by ahmadhanb, whyzar, nmtoken, Vince, Andre Silva Nov 19 '18 at 1:04

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  • Maybe related: osgeo-org.1560.x6.nabble.com/… – AndreJ Nov 16 '18 at 11:09
  • Yes close, sad that the suggested program (helmparms3d.sourceforge.net) shows no source code :P. – Sceada Nov 16 '18 at 12:22
  • Nevermind, I found the source code from helmparms3d. Well maybe it helps me a little bit. But my question regarding the handling of the residuals is still open. – Sceada Nov 16 '18 at 14:32
  • You can regard the remaining error as the "accuracy of the transformation". – AndreJ Nov 16 '18 at 18:36