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Micha
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> Hello zxy55, > > > I can confirm now the report works perfectly. > > Thank you. > > > I don't know the backend of the code, but i have noticed if i include these unknow points, they affect the parameters of transformation. > > I cannot confirm this behavior. > > Let the source system be > > [pre]# J. L. Awange, Erik W. Grafarend - Solving Algebraic Computational Problems in Geodesy and Geoinformatics > # ISBN: 978-3540234258 > # 3D-Helmert-Transformation > # Startsystem > > Solitude 664789.307 4157222.543 4774952.099 > Buoch-Zeil 688836.443 4149043.336 4778632.188 > Hohenneuffen 690340.078 4172803.511 4758129.701 > Kuehlenberg 642997.635 4177148.376 4760764.800 > Ex-Mergelaec 671808.029 4137012.190 4791128.215 > Ex-Hof-Asperg 666952.887 4146292.729 4783859.856 > Ex-Kaisersbach 702670.738 4138759.902 4785552.196[/pre] > > and the target system be > > [pre]# J. L. Awange, Erik W. Grafarend - Solving Algebraic Computational Problems in Geodesy and Geoinformatics > # ISBN: 978-3540234258 > # 3D-Helmert-Transformation > # Zielsystem > > Solitude 664818.678 4157870.237 4775416.524 > Buoch-Zeil 688865.785 4149691.049 4779096.588 > Hohenneuffen 690369.375 4173451.354 4758594.075 > Kuehlenberg 643026.700 4177796.064 4761228.899 > Ex-Mergelaec 671837.337 4137659.549 4791592.531 > Ex-Hof-Asperg 666982.151 4146940.228 4784324.099 > Ex-Kaisersbach 702700.227 4139407.506 4786016.645[/pre] > > The parameters of the spatial Helmert transformation reads > > [img]https://i.ibb.co/MysW46pM/coordtrans-helmert-transformation-solution.png[/img] > > > If we add some [i]random[/i] points to the source system > > [pre] > NEW-1 1.000 2.000 3.000 > Solitude 664789.307 4157222.543 4774952.099 > Buoch-Zeil 688836.443 4149043.336 4778632.188 > Hohenneuffen 690340.078 4172803.511 4758129.701 > NEW-2 4.000 5.000 6.000 > Kuehlenberg 642997.635 4177148.376 4760764.800 > Ex-Mergelaec 671808.029 4137012.190 4791128.215 > Ex-Hof-Asperg 666952.887 4146292.729 4783859.856 > Ex-Kaisersbach 702670.738 4138759.902 4785552.196 > NEW-3 7.000 8.000 9.000[/pre] > > the solution reads > > [img]https://i.ibb.co/nqnbRnFv/coordtrans-helmert-transformation-verification.png[/img] > > and is identical. > > /Micha
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