Base Point - Revit Internal Origin (0,0,0) for export/import (DWG, IFC...)

[M_Perez]

I've seen progress made to 'solve' confusion between Revit Internal Origin and Base Point but I have to say it should be time to solve the problem itself.

We have 3 different Coordinates Systems in Revit:

-Revit Internal Coordinates
-Revit Project Coordinates
-Revit Survey Coordinates.


But Revit is programmed as they don't exist. I can get the coordinates from any point in Project and Survey Coordinates but not in Internal; I can move the Project Base and Survey point and I can just Import or Export based on Internal System and sometimes Survey Coordinates but never on Project Coordinates.

For me there where 2 solutions:

-Make it possible to move the Revit Internal Origin (I guess it isn't easy to achive)
-Make it possible to select Project Base and Survey Point als reference ALWAYS. 

I should be able, e.g. to Export and Import DWG base on Project Base. And Import IFC base on any of them.

[Anonymous]

Big +1 for being able to export DWG using Project Base Point / Project Coordinates.  This would be BY FAR more useful than Internal Origin / Internal Coordinates.  And the programming is likely pretty simple.

Cheers.

[DerekHays]

I agree, it's common sense that exporting to DWG using the Project Base Point should be the default base point (0,0,0) in the resulting DWG.  Or at the very least an option.

[steiner]

Export point management needs definitly some updates: In our Plan documemts we have to have multiple "layered" views (plan view, doted ceiling view...etc). While exporting these plan to dwg the views in the dwg are "pushed" (-> if more than one view is in the plan just one keeps the choosen 0 point in export settings).

For our practice these means that we have to export the composing views seperatly and do some, timeconsuming and possible source of errors, extra work.

[Anonymous]

I agree with the above comments. Please support DWG exports using the Project Base Point.

[coneil5]

This needs to happen. We are inheriting projects on the GC side that have the drawings that use the coordinates of the PBP, but have the PBP, Internal Origin and Survey Point at 3 different locations. Architect's issue or not, we should be able to export to all three systems, especially the PBP.

[bjornrubin]

The DWG export options should be like the IFC export options, where there are multiple choices on what coordinate base to use. 

[Gregory.Glaz.SG]

We should also be allowed to copy/paste using Project Base Point or Shared Coordinates, not just Internal Origin.

[johan.de.cockBZNEG]

How is this still not solved?! It should be basic functionality for a software like Revit.

It's works so well for IFC. Simply provide the same functionality for DWG!

Even more ... However a view is rotated by means of a scope box, project North, True North, ... The exported DWG should not necessarily follow this same view rotation! Just as with IFC export the option should be to rotate the DWG according to settings. "Project Base Point with True North rotation" for example. That will mean the viewport in the DWG layout will have to rotate the modelspace to have the DWG Layout the same again as the sheet in Revit. DWG allows this kind of manipulations, so it must be feasible.

[DuncanGammieLDS]

Revits Coordinate system is absolute nonsense. 

Quite simply Internal Origin and PBP should be coincident, and not allowed to move. As everything breaks outside 33km disc, The survey point should also be coincident with PBP and Internal Origin. 

Define relative coordinates/rotation to PBP and that should be it. Done and dusted, no more confusion. Shared Sites can then be defined from common points, and updating a buildings position on site shold not be able to be done in 5 different ways. 
Relocate Project should move the project relative to Internal Origin/PBP and NOT move the origin. 

It's works so well for IFC. Simply provide the same functionality for DWG! - this statement is only true if not coordinating with other platforms. Revit still cannot fathom IFC rotation from other platforms relative to PBP/True North. 

[mike.greisenT5JVY]

Funnily enough, I came here after searching for how to export to DWG using Survey instead of PBP.  Which could mean there's a workaround for anyone who's trying to do the opposite. 

We issued a DWG export but were asked to fix the Coords. Turns out the user had exported a sheet and sent that, and apparently when you do this (with Shared Coordinates checked in the settings), it selects PBP instead of SP as the coord system. So for us the fix was to export the view instead of the sheet, but the opposite should work too I guess. I haven't done a lot of testing but it appeared to work this way on the one quick test I did.

So, in theory: to export using Survey Point use a view, to export using Project Base Point use a sheet.

Would be interested to hear if this works or doesn't work for people. 

[taaviSWPX2]

They should just add the same options from IFC export to DWG export as well: Project Site and Coordinate Base. This would solve the whole problem.

Right now I'm using 2 sites: one with Survey Point set to the Project Base Point and another set to the actual Survey Point, I just select whichever I need and export the DWG by Shared Coordinates. This works, but is quite error-prone, because I sometimes forget to change the site, export the DWG and then get complaints from the sub-contractors that the DWGs are located in the wrong place.