Site File - Moving the Project

PotGuy · 发表于 2022-7-8 20:40:08

My company is finally looking to begin using Revit as a supplement for AutoCAD, as BIM is taking hold in the UK now. A part of the BEP, we have a Project Origin Point (0,0,0) which is located at the top of foundation. This project is very new.Currently, I've got hold of a dwg. which was accurately drawn to real world coordinates and orientation for the project. Its units are in mm. This issue for is that the point where the Project Base Point is found when Hidden Elements are shown is not over the point we need it to be. ie. It's found in the centre of the drawing, rather than over the point we need it to be over. (A ref point) This drawing was imported from centre to centre, as per this guide: http://autodesk-revit.blogspot.co.uk/2013/07/shared-coordinates.html Is there a way of moving the Project Origin Point so that we can put the project origin to 0,0,0 over that ref point, rather than the centre of the drawing?
Formatting seems to have got *cough* up my end, so sorry if this post doesn't come out as well as I'd hope. Work computer has limited certain online scripts etc. which are common use.

tzframpton · 发表于 2022-7-8 21:03:21

Not sure if this is me doing something wrong right now, so here's where I am. The CAD file is accurate in coordinates and drawn to True North orientation. What's confusing me is that when I put in the coordinates of the Project Base point, rather than it being over REF 1 (Which is where the coordinates are in AutoCAD) it's a good distance away from it, even though the coordinates I input into the Project Base point is the same as the one in AutoCAD. So what I have right now is an imported dwg. from origin to origin that's coordinates don't align with the coordinates in Revit, even though I told Revit where the coordinates for the Project Base point is. I'm sure this is because I'm still not used to Revit, but it's completely stumped me.

PotGuy · 发表于 2022-7-8 21:13:51

In AutoCAD, how far away is the Site Plan or Building Plan drawn in relation to the WCS 0,0,0 origin? Revit has a hard time with things drawn at extreme distances from the WCS origin.
Remove the DWG Link from your Revit project. Open a View from the Level you wish to use, and in Properties, change it to "True North". Turn on the Project Base Point (PBP) and type in the rotation angle of True North to match that of the DWG file. Now Link your DWG file, origin to origin. (Tip: in the DWG file at the WCS 0,0,0 origin, draw a cross-hair or something so you know where the origin is in Revit) If you need to move the PBP, then move it to the location you need but it should be fine from there. This will "orient" the project to match the True North of the DWG file. All you have to do is pick Project North in any View to realign the orientation of the project "upright".

Remember that you can Clip and Unclip your PBP before you move it. Think of a table with a vase sitting to one side of the table on a tablecloth. Moving an Unclipped PBP is like picking up the vase and moving it to the other end of the table. Keeping the PBP Clipped is like grabbing the tablecloth and moving it to the other end of the table, pulling the vase with it. In other words "project relocation" is the same as moving a Clipped PBP.

Just play around with it until you get the results you need.

tzframpton · 发表于 2022-7-8 21:39:02

Will have a play round with it. That's also confirmed my understanding of how the PBP works.
Also, the distance between the coordinates and the 0,0,0 point is 517248424.502mm. Probably an extreme distance.

PotGuy · 发表于 2022-7-8 21:51:23

Would you say no to me first unclipping the PBP, putting the PBP coordinates in, then moving the linked CAD file before re-clipping it?
Have imported the file, ensuring it isn't rotated to my view having the view imported in facing True North?

[综合讨论] Site File - Moving the Project

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