Rotating project north

[BIM_Dreamer]

hello, what is the best thing to do to rotate my boundary  line (property line-project north) without affecting my N/E coordinates. So that when i draw my building perpendicular to vertical boundary line. thank you.

[RDAOU]

Hello @BIM_Dreamer

The question is a little bit vague! How are you rotating your boundary line?!

Normally the boundary line is set out to True North and Survey Point are fixed/clipped (typically at the corners of the boundary). That survey point will represent the fixed point in the physical world and is used to correctly orient the building geometry to or with respect to the boundary line. And this is done by setting the angl to True north (not by rotating the boundary/property line). Subsequently;

1. your project's base point reads its coordinates from the survey point
2. and the spot coordinates read their coordinates either from the project base point or the survey point depending on how you set them to function

Unless the coordinates of the those reference points change (Survey point and Project Base Point); the Easting and Northing is not supposed to change! Rotating to True North and Project North doesn't change coordinates it only changes the orientation. To set the angl to true north you can use  eitehr of the following:

1.  Rotate Project North from Manage Tab > Project Location Panel
2. Select the Project Base Point and enter the angle to true north there... (the circular one - Not the triangular Survey Point)

(You might want to look more into Project Base Points and Survey Points Tutorials as well as Shared Coordinates...The documentation on Revit Help is quite good and there are some good material for both topics can be found on Autodesk University)

If you are using rotate in order to align your property line with True/Project North...the coordinates (N&E) will definitly change because when you are using rotate the only fixed point (where N/E do not change)  is the center of rotation...Everything else gets shifted elsewhere (You are not supposed to do this)

If I misunderstood something; please do clarify more what are doing; what are the results you are getting and what results would you like to get instead.

[BIM_Dreamer]

Hi,thank you for reply. I mean align not rotate appropriate words. I want to align boundary line perpendicular to thick red line without affecting my project base point coordinates. I already change angle in project base point but doesn't work. Thanks

[RDAOU]

@BIM_Dreamer

Using Align tool is same like Rotate tool...they both change locations of the coordinates. Hence changing it with rotate or align will always mess up the coordinates. It cannot once follow project north and once true north.

Question: Is it only an issue of drafting (as in you want to draft perpendicular to the boundary line or Is it an issue of coordinates and setting out the project? I am thinking it could be that it has nothing to do with the North orientation.

So very little shows in that image...If the project north has been arleady set and you want to just draft perpendicular to the property line; it might be that rotating the Crop View to be orthogonal to the property line does the trick!!! Give it a try it might be what you need; enable crop view in the properties palette then select it in the view and rotate it to the property line...once done drafting you can reset it to how it was

[BIM_Dreamer]

hello, thank you again for your reply. here are some explanation hope you can understand. I already set my true north position/locations correctly. If you look at my file attached you can see my boundary is slanted. Because i want to start my building (my walls, etc) perpedicular to the boundary line . i have difficulties creating a wall, stair in a slanted position. is there a way to set my project north aligned vertically to the boundary line. thanks

[chrisplyler]

Don't rotate Project North. Leave all your views that are set to Project North alone. Draw your building in them orthaginal to the screen.

Unload/delete your survey file. Go into a site plan. Set it's orientation to True North. Rotate True North the appropriate amount. Link your survey file into that site plan with the "current view only" option checked.

[RDAOU]

@BIM_Dreamer

I setup my projects in a somewhat similar way to what @chrisplyler discribed. I usually have to files; one for the project model and one for the site & topography

In the first file (Building Model) - I keep the Project North Up and can actually say I never rotate it to anything besides the setting the angle with true north. I draw everything orthogonal to the project north there.

When done I link the Project model into the site/topo file where I would have set the true north and survey points to where the pins are located. then in this file I rotate/orient my project file to be parallel to the Site boundary and where it should be setout on the plot. then I publish coordinates to the project model...This sets the survey point there similar to that of the site.

From there on you just need to switch to project north in the properties palette to have everything facing up as per project north or set it to true north when you want to see how it is actually on site. Once that is set...your coordinates should not change when switching between whichever orientation and the other

It is something similar to what is discribed in this YouTUBE HERE (Credits to cwm9 and Luke Johnson)