Rigid translation and rotation used during 2020 development of soil mesh processing pipeline
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A 4x4 matrix
This is the matrix I created empirically by scanning an empty soil specimen holder with a round steel plate on top. I then used MeshLab to align the mesh to the x-y plane using the Rotate to fit a plane filter and manually tweaked it a bit more with the Alignment tool. I then recorded the values visible in the lower-right corner of the screen and saved them as a .csv file. That file has been converted to the R data object which is manifested here. Updated 2020-11-17.
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