Apply Transformation results are broken (Swiss Grid to local frame)
Posted: Wed Nov 15, 2023 4:48 am
Good Morning Everyone
I got the task to apply a transformation onto a global E57 point cloud data file (40 GB) with Swiss Grid coordinates (LV95/LN02).
As result a local coordinate system is required. I got the translation and rotation parameters and a section of the original point cloud, which allows me to try the task in shorter time. The size of the section is 4 GB.
The transformation was done in two steps. First the shift from the global origin to the local origin and afterwards a rotation with an angle of 19.89 degrees. The transformation values are stored in a text file to negotiate input mistakes. All steps are done by four eyes control.
We got also a 3D CAD model which shows, that the transformation process of the section point cloud went fine.
With this result I repeat the steps to transform the 40 GB file, but it looks only on the first view good. We took a closer look to the result and there is a slightly shift on the x and y axis from -4.2 and 10.6 cm. The z axis is equal to the section point cloud.
Due to customer issues I am not able to upload a screenshot here, but please @daniel please contact me to dive deeper into the issue.
I got the task to apply a transformation onto a global E57 point cloud data file (40 GB) with Swiss Grid coordinates (LV95/LN02).
As result a local coordinate system is required. I got the translation and rotation parameters and a section of the original point cloud, which allows me to try the task in shorter time. The size of the section is 4 GB.
The transformation was done in two steps. First the shift from the global origin to the local origin and afterwards a rotation with an angle of 19.89 degrees. The transformation values are stored in a text file to negotiate input mistakes. All steps are done by four eyes control.
We got also a 3D CAD model which shows, that the transformation process of the section point cloud went fine.
With this result I repeat the steps to transform the 40 GB file, but it looks only on the first view good. We took a closer look to the result and there is a slightly shift on the x and y axis from -4.2 and 10.6 cm. The z axis is equal to the section point cloud.
Due to customer issues I am not able to upload a screenshot here, but please @daniel please contact me to dive deeper into the issue.