If I assign a number in the same units as the native SketchUp file, e.g. millimetres, to IfcSite.RefElevation > IfcLengthMeasure in Dynamic Components, the export property when viewed in an IFC viewer displays 2.54 x (millimetres/1000). For example 19000mm displays as 482.6m?
Why might there be some sort of imperial factor conversion going on?
The classification is IFC 2x3, the export is with the IFC Manager extension and I’m using SketchUp2023.
I’ve isolated the issue to IFC Manager version 4.1.5 exporting schema IFC2x3.
With the SketchUp native file units set to millimetres, the values present after export:
IFC Manager 4.1.5 export IFC 2x3 = 482.6
IFC Manager 4.1.5 export IFC4 = 19000
IFC Manager 4.3.3 export IFC2x3 = 19000
IFC Manager 4.3.3 export IFC4 = 19000
The reason I am preferring Manager v4.1.5 is that v4.3.3 exports 2 IfcProject classes if you include IfcProject in the SketchUp model heirarchy (1 x default plus 1 x Outliner IfcProject).