Position of georeferenced model on ground plane grid

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Götz Echtenacher

• May 15, 2017 06:58

I have a suspicion that I need to be confirmed:

I always assumed that the grid displayed as the ground plane has a fixed position in relation to a georeferenced model.
Then I noticed that after re-running alignment with a georeferenced laserscan, the model has shifted significantly on the world grid and also in relation to the 3D viewport.
A CP that I added does not change it's coordinates to any meaningful extent.
Is my presumption correct that the displayed position of the model on the world grid is arbitrary?

• 1038position_component0.jpghttps://www.capturingreality.com/forum/download/file.php?id=10382097281imageFile jpg
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• 1039position_component0-1.jpghttps://www.capturingreality.com/forum/download/file.php?id=10392097281imageFile jpg
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  ShadowTail

  • May 15, 2017 09:02

  Yes.

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  Götz Echtenacher

  • May 15, 2017 14:03

  Thanks!
  
  That's a bit invonvenient though since I need to compare the two models and see how much it has improved...
  
  RC-Team, ist that a bug or a feature?

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  chris

  • May 16, 2017 01:08

  are you looking for a workflow to get everything in and out at the same location?
  
  you should set project/output to world-co-ordinates.
  
  work out what x,y offset you need to re-zero it. and then save this in a text doc.
  
  I've found this to work quite well. keeping everything the same over quite a few different projects in the same area.

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  Götz Echtenacher

  • May 16, 2017 06:27

  Hey chris,
  
  in most cases I work with geo-referenced models, either by theodolite or laserscan.
  So the absolute position is not an issue, even going back and forth between different programs.
  
  I only want to be able to compare models in-program by switching between components.
  Often it is fine, but sometimes there is a significant shift.
  It does NOT concern absolute coordinates but the RELATIVE position on the grid and in relation to the viewport.
  I find that really weird and unintuitive.
  Might open a bug-report about this...

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