Really weird incorrect dimension importing Archicad .dwg?

Rhino Rhino for Windows
1

So a colleague I’m working with uses Archicad. He exported a 2D drawing as a .dwg. When I imported it into my Rhino 8.15, the drawing came in accurately, but some of the dimensions were completely wrong while others were correct? e.g. A vertical dimension of 10’ and another of 4’ came in as that, and measured as that in Rhino. A horizontal dimension of 79’-6" came in and became 7’-4"!! Truly weird. I wondered if Rhino was converting it to paperspace sizes but that was not the case. Thoughts?

2

have you tried changing the annotation style of the imported dims to one of your own inside of Rhino

3

Hi Nicholas -
Can you post a .dwg file that shows this behavior?
-wim

4

I’m not sure I can upload a file for NDA reasons. Here is what I discovered.

If I import the file with model units set to feet and layout units set to inches. The dimensions come as the were done in Archicad, (saying 86’-3") but in Rhino modelspace that 86’-3" measures 1034’-11".

However, if I import the file with model and layout units set to inches, the dimensions come in wrong, but the measurement in Rhino is correct. e.g. 86’-3" comes in as 7’-2", but in Rhino modelspace measures the correct 86’-3".

5

Here goes.

HOTEL.dwg (1.8 MB)

6

it looks like a scaling issue, (also what units was the original file drawn up in) if I import to one of my preset templates, scale it up then change the dims to one of my annotation styles, all good

8

Thanks for testing. He is working in imperial like I am. I was under the impression that .dwg files generally imported and exported without any need to do additional work when in the same units. If I remember correctly, my Autocad files did. Only my dynamic blocks didn’t work.

9

Ok Imperial, but what units, inches or feet ? It might be worth playing with Imperial units, hope you can get it sorted :+1:t4:(I often get lots of different files from all sorts of softwares, I still have issues sometimes, you’re not alone :blush:)

10

DWG files don’t contain units, so…I mean if both parties are working in the same units in theory you might not have to do anything, but there are a lot of scales applied to a lot of things in different ways, so…