Change project coordinates to match existing CAD project

[Andrew.Frey]

I tried doing a little searching, but didn't find what I was looking for, so apologies if I missed it. I'm a little new to using the coordinate systems in Revit and I am working on a project that has both CAD and Revit files. I wasn't involved in setting up the Revit model originally, and it turns out that the coordinates of the two are off. We have, to this point, been handling this by when we export our CAD/NWC files from Revit, we run a script on the CAD files that will translate their X,Y,Z coordinates to the CAD file coordinates.

I have been trying to figure out how to move our base point, currently at 0,0,0, to the CAD coordinates (21506297.58", 8349778.968", 14748"), state plane coordinates? (see script below)

Is there a way to change the base point of the project, that will not affect any views that have already been set up? If we can eliminate having to open every drawing and apply the script when we export, it would be a huge time saver. 

I've already tried selecting the base point, and manually changing its location in the properties, and I've tried specifying a value at a point using the coordinates panel. But, this doesn't appear to match with the N-S/E-W/Elevation model of revit coordinates.

Here's the script we use, as you can see its very simple and basically just shifts the Revit export:

thanks!

[Matt__W]

If you have access to Civil 3D I would recommend using the Shared Reference Point Tool. It's fast and easy.

[Andrew.Frey]

I don't believe I do, but I'll do some checking. Thanks for the reply!

[Matt__W · Accepted solution]

Here's an AUGI write up of how to do it without the shared reference point tool.

https://www.augi.com/articles/detail/shared-coordinates-and-civil-state-plane-coordinates

[Andrew.Frey]

Ha! I had just opened that before I got your response. Good to know it should be worth my time. 

[Andrew.Frey · Accepted solution]

Okay so using that link and banging my head against the wall I was able to figure it out. I don't know why I didn't think of it, but our X, Y, Z coordinates don't correlate to N-S, E-W, Elevtion. It is actually Y, X, Z. So, I took the values from our script, and inserted them into the values for the project base point and our exports are now coming out spot on.