Helmert coordinate transformation in VB.net

Joel Sjögren

Mathematician

The task was to implement the Helmert transformation for use in a bridge construction/maintenance project. I found an old article by Shinji Umeyama explaining how to solve the problem using the SVD decomposition. So I learned just enough of VB.net programming in order to import a suitable linear algebra package and implement the algorithm.

In a follow-up project, we used this Helmert transformation as the basis for an error correction procedure during the casting of concrete segments.

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This is the review given by my client:

“Joel completed this job exceptionally well and within the timeframe that he had provided. He was very easy to communicate with and I will definitely be assigning more similar work to Joel in the future.”

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