Basepoint/Survey Point and Internal Origin

[TerryRichardson]

Hey Everyone

I did something stupid and am hoping there is a way to correct this.

I am working on a large campus project that sooner or later is going to involve adding many linked files to a single overall site plan file..

At the moment, I am working on the first project and forgot to properly locate the base and survey points.. Now for whatever reason my internal origin point is on my first floor level and I do not want it there.. I would rather it represent sea level which is 24770mm below first floor level.. Also, I would like my first floor level to indicate a height of 10000mm instead of 0 or 24770..

I am currently working on Revit 2021.1.1 if that helps.

Any help would be greatly appreciated.

[TerryRichardson]

Hey Everyone

I did something stupid and am hoping there is a way to correct this.

I am working on a large campus project that sooner or later is going to involve adding many linked files to a single overall site plan file..

At the moment, I am working on the first project and forgot to properly locate the base and survey points.. Now for whatever reason my internal origin point is on my first floor level and I do not want it there.. I would rather it represent sea level which is 24770mm below first floor level.. Also, I would like my first floor level to indicate a height of 10000mm instead of 0 or 24770..

I am currently working on Revit 2021.1.1 if that helps.

Any help would be greatly appreciated.

[barthbradley]

Don't fret about the Internal Origin of the Project. It doesn't come into play when Linking and Coordinating Projects. The only thing that matters is the Survey Point location.  

[barthbradley]

Don't fret about the Internal Origin of the Project. It doesn't come into play when Linking and Coordinating Projects. The only thing that matters is the Survey Point location.  

[Ilic.Andrej]

Fortunately, the clipped state of Project Base Point was removed in Revit 2020.2 so no confusion there. Just right click on the Project Base Point and select "Move to Internal Origin". Then, unclip the Survey Point, set all its values to 0, clip it and then move it to the Internal Origin. All of your points are at the internal origin and this is where the sea level should be. Why? Because the topography point elevation is measured from the internal origin. Now, move all your levels to the desired elevation. If you want levels to display the distance from the sea level, set their elevation base to Survey Point Origin. After that, you can move the Project Base Point to the ground floor and move the Survey Point only when it is unclipped. That way, you can set some annotations to show the elevation from the sea level, but you can also set other annotations to show relative elevation from the ground floor.

[Ilic.Andrej]

Fortunately, the clipped state of Project Base Point was removed in Revit 2020.2 so no confusion there. Just right click on the Project Base Point and select "Move to Internal Origin". Then, unclip the Survey Point, set all its values to 0, clip it and then move it to the Internal Origin. All of your points are at the internal origin and this is where the sea level should be. Why? Because the topography point elevation is measured from the internal origin. Now, move all your levels to the desired elevation. If you want levels to display the distance from the sea level, set their elevation base to Survey Point Origin. After that, you can move the Project Base Point to the ground floor and move the Survey Point only when it is unclipped. That way, you can set some annotations to show the elevation from the sea level, but you can also set other annotations to show relative elevation from the ground floor.

[TerryRichardson]

Thank you

Does it matter that I already have a complete building with a full set of working drawings already in this project?

[TerryRichardson]

Thank you

Does it matter that I already have a complete building with a full set of working drawings already in this project?

[barthbradley]

it does not matter.

[barthbradley]

it does not matter.

[Ilic.Andrej]

Moving levels will not affect floor plans, because floor plan views are associated with levels. However, sections and elevations will be affected. I recommend creating a scope box after moving the levels. Position it where you want the elevations and sections to be. Then, assign that scope box to elevations and sections.... Try and see what happens. Save the project before you do this.

[Ilic.Andrej]

Moving levels will not affect floor plans, because floor plan views are associated with levels. However, sections and elevations will be affected. I recommend creating a scope box after moving the levels. Position it where you want the elevations and sections to be. Then, assign that scope box to elevations and sections.... Try and see what happens. Save the project before you do this.

[lionel.kai]

BTW, just curious - why do you want Level 1 at 10000 (instead of 0 or 24770)?

Moving the Survey Point and showing Level elevations from SP is relatively easy, as others have mentioned, but unless this is the site model (where the Topography will live), why do you need the Internal Origin lowered?

[lionel.kai]

BTW, just curious - why do you want Level 1 at 10000 (instead of 0 or 24770)?

Moving the Survey Point and showing Level elevations from SP is relatively easy, as others have mentioned, but unless this is the site model (where the Topography will live), why do you need the Internal Origin lowered?

[TerryRichardson]

In all honesty just so that the main point has a clean looking value is all and so we do not get into negative levels.

[TerryRichardson]

In all honesty just so that the main point has a clean looking value is all and so we do not get into negative levels.

[Iev60047]

I am trying to follow this thread to no avail. I have set my elevations to be above sea level (e.g. ~680'). I would like to show level 1 as 0'. I moved my project base point, and survey point to my internal origin. Following the steps above, I tried to change the elevation of my levels, starting with level 1. As soon as I tried to move it, I got all sorts of disconnected duct warnings. What am I missing here? I have a large centralized model (all work done in one building).

Maybe I am being dense and missing something, but here's the workflow I used to change my level elevations from representing height above sea level, to a arbitrary 0' at level 1:

1. Opened up a section view and enabled viewing for the survey point and project base point.
2. Ensure that the survey point and project base point are both located at the internal origin.
3. Used the following tool: Manage -> Project Location -> Position -> Relocate Project, and moved the level 1 down to the level of the internal origin (which should also be the level of the survey point and the project base point).
4. Selected Project Base Point and changed the elevation (which should now read the height of sea level to level 1 as a negative number, e.g. -680') to 0'.
5. This last step I am unsure about, but I moved my survey point to -680', which placed it elevation-wise at the internal origin. Coincidentally, I am also developing Revit models for a large campus, that eventually will be linked together.

Do those steps sound right? 

[Iev60047]

I am trying to follow this thread to no avail. I have set my elevations to be above sea level (e.g. ~680'). I would like to show level 1 as 0'. I moved my project base point, and survey point to my internal origin. Following the steps above, I tried to change the elevation of my levels, starting with level 1. As soon as I tried to move it, I got all sorts of disconnected duct warnings. What am I missing here? I have a large centralized model (all work done in one building).

Maybe I am being dense and missing something, but here's the workflow I used to change my level elevations from representing height above sea level, to a arbitrary 0' at level 1:

1. Opened up a section view and enabled viewing for the survey point and project base point.
2. Ensure that the survey point and project base point are both located at the internal origin.
3. Used the following tool: Manage -> Project Location -> Position -> Relocate Project, and moved the level 1 down to the level of the internal origin (which should also be the level of the survey point and the project base point).
4. Selected Project Base Point and changed the elevation (which should now read the height of sea level to level 1 as a negative number, e.g. -680') to 0'.
5. This last step I am unsure about, but I moved my survey point to -680', which placed it elevation-wise at the internal origin. Coincidentally, I am also developing Revit models for a large campus, that eventually will be linked together.

Do those steps sound right?