GLB 3d Model rotated after export

[Giancarlo]

Hi, I have a problem exporting a 3d model in .GLB format.
My model is georeferenced (EPSG 6708) and when I try to export it in GLB format, it appears rotated 90 degrees along the X axis.

Every software I use to view the model shows this error. How can I do to export the model correctly? Thank you

[FabianN]

I also report this bug in another reference frame (EPSG 2056).
Hopefully the Agisoft team will fix it soon.

Thanks.

[Alexey Pasumansky]

Hello Giancarlo and Fabian,

Do you use Local Coordinates option in the Export Model dialog or select any geographic/projected system?

[FabianN]

Hi Alexey,

In my case, it is happening in the geographic/projected CS.

[Giancarlo]

Hello Giancarlo and Fabian,

Do you use Local Coordinates option in the Export Model dialog or select any geographic/projected system?

Local coordinates

[flyingburrito]

I'm following up to see if this issue has been resolved.  I too had my model rotated when I exported it as a GLB.  I am using map coordinates (a UTM projection).  The top-down view becomes the front-facing view when exported.

Thanks!

Paco

Added on 1/8/2024:

As a follow-up, this may be related to the coordinate system.  Metashape is exporting the 3D models in a right-handed (E-N-U) coordinate system, like most geospatial software would expect.  The glTF also uses a right-handed system, but relative to the 3d asset -- NOT the global cartesian reference frame.  In this regard, "glTF uses a right-handed coordinate system. glTF defines +Y as up, +Z as forward, and -X as right; the front of a glTF asset faces +Z."  See https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html. 

For t his reason, the 3D landscape appears rotated toward the viewer about the X-axis by 90 degrees.

This is fine for a small object, but it messes up the orientation of a landscape ingested as a 3D element. 

[Alexey Pasumansky]

In Metashape 2.1.1 it is possible to select "use glTF Y-up convention" option in the Export Model dialog when glTF format is used.