Hi there. I am a former AutoCAD user in the process of converting to Revit. One of the first projects we are testing Revit on involves a number of similar, but nonetheless different, buildings on a single site. Across the buildings, there are 3 slightly different orientations.
I understand the difference between true north and project north, but am still having a lot of trouble referencing (linking) files with appropriate insertion points and origins, as well as creating sheets with squarely oriented buildings.
Here is how I'm trying to do it:
- create a revit terrain file to create topography and building pads with AutoCAD survey and setout file as a linked reference. AutoCAD file linked into site plan view origin to origin at true north. Export shared coordinates to DWG file.
- create each building file and link revit terrain file (as attachment) and AutoCAD survey file into site plan view (true north). Draw gridline to setout building alignment, then rotate project north to align to the gridline I have drawn. Create building in plan views etc. (this works fine the first time; but gets messy with any new project north in other building files)
- eventually create a page setout revit file with each building linked into it (and the original terrain file via attached link) to create one single set of documents.
This process appears to be working except for some major trouble when it comes to setting up the building files with different orientations. Based on my AutoCAD experience, I would have assumed that true north roughly equates to WCS and that this is the base reference (insert/orientation) for all links which never changes. Following from this I would have thought that each building file could have its own project north orientation without effecting links based on true north. However whenever I attempt to create a new building layout with different project north, it thows all of the linked files out of orientation (in site, true north view), even if true north is unchanged.
Can I have multiple building files with different project norths referencing the same site file??? Having never had a problem like this with AutoCAD before, I can't believe how difficult it seems in revit!
Many thanks for any help.