Problem with importing mesh

Development Asset Creation
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1

It is not the first time this happens.

When I export a mesh as obj, calculate ambient occlusion in meshlab and re-import it in the same RC project, everything works fine (even if that after saving it in meshlab it complains about the missing info file.

But when I want to do the same only import it into a different project (I optimized alignment in a different file), the orientation is completely off.
Both models are geo-referenced at absolutely the same coordinates (see attached images, units are metres).
The bounding box import works fine, it is absolutely identical in both projects.
Only difference is that one is geo-referenced by laserscan and the other one by GCPs derived from the first model.

I did export the info file, the first bit is identical in both models:
<Model globalCoordinateSystem=“+proj=geocent +ellps=WGS84 +no_defs” globalCoordinateSystemName=“local:1 - Euclidean”
exportCoordinateSystemType=“0” transformToModel=“1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1”>
<Header magic=“5786959” version=“1”/>

Export and import coordinate system is set to local:1 - Euclidean
Don’t mind the exclamation points at the CPs - thats the reason I did some re-alignment.
It strikes me that the model is positioned exactly in the same relation to the ground plane as in the original project

Any idea what’s happening here?

Orientation-off_new.jpg

Orientation-off_new-in-old.jpg

2

Hi Götz Echtenacher

You use TIE points or GCPs ?

3

Hi Wishgranter,

The initial model is geo-referenced by laserscan.
I add Tie Points (Control Points), transform them into GCPs, transfer their actual location into their “should” XYZ by typing it (since ctrl-c wont work).
Then I use those to geo-reference the new model.

That should not be the cause since it happened in a similar case (same building) where both parts were geo-referenced with absolutely the same laserscan. I was just too lazy to report it then :slight_smile:
The shift is the same as the model is displayed differently on the world grid (is my guess by sight).
Transferring RC-components works fine and as I said ex- and import of bounding boxes too.
It is only the mesh that causes trouble…

4

Ok, since I was on another safari in the ever increasing help section, I managed to answer that one by myself:
During export, the coordinate system was set to Grid Plane which explains why it was placed at the same position in relation to the grid!
I need to export it as Project Output to get the real world coordinates.