Hello mauovernet,
Then you can follow these steps:
- open Metashape Preferences (via Metashape menu) and open Appearance tab,
- in the Grid section switch units from Pixels to Meters in the Cell Size line; select XZ in Plane line, if you need to follow Y-up convention, click OK to confirm and exit,
- open your project (if it is not opened yet) and in the Model menu -> Show/Hide items enable Show Grid option,
- then in Model Menu -> Transform Object select Move Object instrument and try to move the model to the middle of the shown grid,
- once done with the model translation, in the Model Menu -> Transform object select Rotate Object instrument and try to rotate the model so that it's base is parallel to the grid,
- when finished switch to Navigation mode to apply the changes, then export the model again.