When exporting a metric model, which has a defined survey point, to IFC, the relation between the survey point and the project base point gets converted to feet within the IFC file. When importing this IFC file, this relation is read as millimeters thus resulting in wrong origin for the imported model.

For example, a survey point that has the following relation to the project base point:

X=-5000 mm, Y=-10000 mm, Z=1000 mm, Angle to true north=30°, gets defined like this in the exported IFC file:

#341=IFCCARTESIANPOINT((16.40419947506561,32.80839895013124,-3.280839895013123));

i.e. the correct coordinate for the survey point, but stated in feet. Since all lenghts in the IFC file are defined in millimeters, this coordinate will be read as 16.4 mm, 32.8 mm, -3.28 mm when imported. The angle to true north is exported correctly.