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Aligning Vectorworks and Revit Models for BIM (for (almost) beginners)


Jack2022

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  • Jack2022 changed the title to Aligning Vectorworks and Revit Models for BIM (for (almost) beginners)
  • 3 months later...
On 11/11/2022 at 5:09 PM, Jack2022 said:

You are doing this before you start modelling. While the steps are the same for after you've modelled, changing the Internal Origin is not advised unless you are being held at gun point by the client. All your sheet layer viewports will be messed up and need reworking. 

I've just done this and it's not as bad as I thought it would be.

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  • 6 months later...

@Jack2022 Really appreciate the time taken to write this out. Although I am a bit confused on something.

 

When you use the circle method to type in the coordinates for the internal origin, why not just change the coordinates in the georeferencing dialog box to match the Revit ones? The reason I'm asking is because I tried to coordinate a model with Revit using the dialog box and it didn't work before, I just don't understand why?

 

I can't wait for this to click but I've been going over all available info for months and still twisted up!

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  • 2 weeks later...
  • 1 month later...

Hi Jack, 

 

Just wanted to say thanks for taking the time to write this out, your instructions were super clear and very easy to follow. 

 

Have you had any feedback from architects, BIM co-ordinators or other disciplines from using this process? No feedback is probably good news anyway but just wanted to see if you'd had anyone comment on whether or not this works as well as Revit files referencing into each other?

 

I've had a few issues now with Revit users commenting on VW files not automatically taking the coordinates/project north from their model and that they have had to manually move them to fit. I will be using your process on my next big project to see if it rectifies the issues I've been experiencing! 

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Hi,

 

Ever since following these steps i've not had an issue with Revit users. The VW model imports correctly their end - but you need to set the VW 'User Origin' coord to match the georeferencing system before you do (last option below): you can change back after to suit - user origin is a movable/ flexible thing and doesnt affect the core set-up of the file. 

 

image.png.72c5ab710e2793b741d6e8a16efb8506.png

 

You also need to make sure you change angle to true north to match the Revit user's set-up (assuming they are lead and you follow their set-up). This depends on whether they have a false north. This was a bit of trial and error for me as depends which way round the degree arc they've gone but becomes obvious if you have an auto cad Topo survey in correct position. If the Revit model is already orientated to true north then no problem. 

 

Lastly VW (as far as I can tell) doesnt allow you to have a false Z value whereas Revit users often have this. In this case I tell them it's as simple as clicking on our model and giving it a Z value as required. This is easy if the model is otherwise in the correct location. 

 

So in simplest terms you need from the Revit user:

 

  • Their Internal Origin Coord location (dont accept alternative terminology about base points etc. often they dont understand what you're asking if not the BIM technician).
  • Angle to true north.

 

Regards,

 

Jack

 

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