Extracting ifcsiunits from read ifc file

Plug Ins Geometry Gym
1

I am extracting information from IFC files using ggIfc.
I would like to get the ifcSIUnit classes.
I cannot extract these classes using the ggIfc Extract or the ggIfc Find Entity functions.
Examining the ifc file in text view I see they do exist.

2

Hi,

Thanks for the question. You need to be a bit careful with this, as you also need the context of the unit.
Units can be referenced by properties, derived units and another concepts. So if you wish to determine the basis units for the data in the model, you should decompose from the context (IfcProject). I’ve attached a script that demonstrates this. We haven’t provided decompose components for many concepts yet, so I’m using a c# component. We can look at adding more decompose components in the next build.

210610 extract units
210610 extract units1150×815 107 KB

Let me know if this makes sense or not.

Cheers,

Jon

210610 extract units.gh (13.4 KB)

1 Like
3

Thanks Jon, this works well.

Matthew