Trouble with Moving Project Base Point

[RedMan77]

So I have an issue where I am trying to move the project base point to align with CAD files of the same building as seen in the attachment.  A short version of the long process I have to go through, the CAD files are the location that the Revit file must move to.  The CAD file was linked in "origin to origin".  The image I have attached is (1) building in (4) of a site.  The location, orientation of these CAD files are vital to stay where they are for our CAD to GIS translation.  When I link in each of the (4) CAD files that make up the site, they all align as they do in the real world.  Want the (4) Revit models that make up the site to do the same.  How do I move the the (22) floors of this Revit model I have attached (see handwritten R) to the CAD file (see handwritten C in image).  This was a process I thought I remembered but am missing a vital step.  When I move the project base point noting seems to change.  Any assistance you can offer would be greatly appreciated.  Don't want to screw up any one of the (22) floors.  Thanks in advance.

[chrisplyler · Accepted solution]

Create a "Site" project file that contains only the cad links all set up correctly and pinned and with the Revit survey point in the right spot relative to them.

Now Link in a Revit building file, and move/rotate the building into the proper location/orientation with respect to the cad files.

Now Publish shared coordinates from the Site file back out to the linked building file.

In this way, you've got site plans that are correct, but you've got a separate building file that keeps it's own project base point where it belongs at the corner of the building or whatever.

Do the same for each additional building that belongs on the site. Or if you've got multiple stories of the same building as separate files, do it for each of them.

[RedMan77]

Thank you very much!!

[RedMan77]

chrisplyler,

I was hoping you could elaborate your answer a bit.  Thought at first read I understood but I am doing something wrong.  Please see first image (cap 14.jpg).  This shows the project base point & survey point. The other (3) bldgs line up perfectly.  I brought in one of the Revit models.  I clicked the "Publish Coordinates".  The status bars says to "Select a linked project to which to publish shared coordinate system.  I selected one of the CAD files I know is correct.  Then the dialog box (see attachment cap 15.jpg).  I clicked ok.  Not sure how the linked Revit file acquires the coordinates that were published in the site plan where you instructed me to link the CAD files.  In the Revit model (cap 16.jog( I have shown where the project base point is relative to the model.  Hope that makes sense where I am going wrong and need further assistance.  Thanks for helping thus far.

[chrisplyler]

You don't click on one of the cad file.

I assume the coordinates in your cad files are real-life correct, and you've put the survey point in the appropriate place and given it the right coordinates so that it matches what's shown on the cad files. So your SITE file is correct.

So then you link the building file(s ... go through this stuff one at a time if you have more than one) into the SITE file. You grab the building and move it into the right place on the site. Maybe you rotate it. Maybe you move it up/down in an elevation view to set the right elevation on site.

Now what you're looking to do is Publish the coordinates it has in that SITE file back to the building file itself. So you activate the Publish tool and you click on the building (not on one of the cad files). And you give the set of coordinates a unique name, like BLDG-A_ON_SITENAME or something.

So now that building file contains it's proper site coordinates, and if you ever have to re-load the link in your SITE file, it will come in at the right place/orientation. But when you're working in the building file, you don't have to worry or think about those shared coordinates...you can just work orthogonally and relative to the project base point at the corner of the bldg.

If you need a second instance of the building on the same site, you can link it in a second time, and you can move it around to the right spot, and you can publish a second set of shared coordinates back to it again. The building file can store as many different sets of shared coordinates as you want to publish to it, as long as you give each set a unique name. In this case you might use BLDG-B_ON_SITENAME or whatever to distinguish the placement of the second instance from the placement of the first instance. This is very handy if you've got, just as an example, a planned residential neighborhood with several of the same floorplan homes going into it.

[RedMan77]

Sorry.  Been out of town.  Yes the CAD file is perfect.  Survey point is where I want it.  I believe I understand the process now.  Thank you very much for the deeper explanation.  

[chrisplyler]

Glad to help when I can.