When Importing IFC File, It Registers Measurements in Meters When it Should be in Feet

zicklag · 9 May 2024 18:53

Hey there! I have an IFC file where I have a wall that is set to 10 feet long.

When I import it into speckle, though, it shows the wall is 10 meters long.

Here’s the IFC File:

gist.github.com

https://gist.github.com/zicklag/fe9f2d2897fe4852f6cea7ec6895b2e4

measureme.ifc

ISO-10303-21;
HEADER;
FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
FILE_NAME('measureme.ifc','2024-05-09T13:45:43-05:00',(),(),'IfcOpenShell v0.7.0-f7c03db75','BlenderBIM 0.0.240502-86cc2bf','Nobody');
FILE_SCHEMA(('IFC4'));
ENDSEC;
DATA;
#1=IFCPROJECT('0BBs2XASH3jeKOajLc4Mob',$,'My Project',$,$,$,$,(#23,#35),#18);
#2=IFCDIMENSIONALEXPONENTS(1,0,0,0,0,0,0);
#3=IFCSIUNIT(*,.LENGTHUNIT.,$,.METRE.);

This file has been truncated. show original

Here’s the speckle link:

https://app.speckle.systems/projects/5c87fc5cbd/models/4131f27fac

When importing into 3dviewer.net, it measures properly at 3 meters, instead of 10.

teocomi · 10 May 2024 17:02

Thanks for providing the sample file, we’ll look into this!
I’m not an IFC expert, but a possible source of confusion could be: measureme.ifc · GitHub

Christopher_Diggins · 15 October 2024 17:25

When opening in Solibri we see the results shown in the attached file. Is this incorrect?

Jedd · 4 April 2025 10:29

Hi @zicklag did you see our announcement, The next-gen IFC importer has been deployed on app.speckle.systems.

You should find it now correctly handles non-SI units (correctly converting the data all to meters)

You should be able to simply re-upload your other files. Please let us know if you have any issues.