Helmert Transformation
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High Quality Content by WIKIPEDIA articles! The Helmert transformation (named after Friedrich Robert Helmert, 1843 1917; also called a seven-parameter transformation) is a transformation method within a three-dimensional space.If the transformation parameters are unknown, they can be calculated with reference points (that is, points whose coordinates are known before and after the transformation. Since a total of seven parameters (three translations, one scale, three rotations) have to be determined, at least two points and one coordinate of a third point (for example, the Z-coordinate) must…mehr

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High Quality Content by WIKIPEDIA articles! The Helmert transformation (named after Friedrich Robert Helmert, 1843 1917; also called a seven-parameter transformation) is a transformation method within a three-dimensional space.If the transformation parameters are unknown, they can be calculated with reference points (that is, points whose coordinates are known before and after the transformation. Since a total of seven parameters (three translations, one scale, three rotations) have to be determined, at least two points and one coordinate of a third point (for example, the Z-coordinate) must be known. This gives a system of linear equations with seven equations and seven unknowns, which can be solved.