Locating Survey Point when importing land survey

[dimitri.b]

I would like to know what the best practice is when importing a land survey. 

In the below image the topography/CAD file provided to me by the survey comes in on different levels. This makes sense because the topography contains contours which are a certain level above sea level or Australian Height Datum. I would like to know that when setting up the levels for the proposed project on the site, is it best practice to move the Project Base point up to the desired level of the building and then change the contours elevation base to be set to "survey point" (see below) and then draw layers at the desired height? 

I also read somewhere about the relocate project button, but the problem with using that is when you try to move the levels up the topography moves up as well? 

Could someone please shed some light on the best practice in dealing with this. 

Many thanks in advance.

Dimitri

[dimitri.b]

Either. In newer versions of revit apparently there is a reset shared coordinates button which is not available in revit 21 and prior. So if you press shared site and say this time you want to aquire coordinates you dont have that option anymore it comes up with the below:

[dimitri.b]

It's hard to explain but when you are given the option to either publish coordinates or acquire coordinates you can only do it once. If you delete the link and then try to re-import the same model you do not get the option to publish coordinates but rather the below prompt:

When you first link in the project you get this prompt:

I followed your suggestions but in I needed to move the survey point in the building file down at sea level 

so that both survey points turn grey. Is this correct? I have attached the files.

Sorry for all the questions you have been a wonderful help as always!

[barthbradley]

Post the 2103110 FL-RevB.dwg.  

[ToanDN]

Here is how to reset Shared Coordinate in previous version:

- Create a new Revit project with just a grid line

- Link it in your project Origin to origin

- Acquire Coordinates

- Remove the link

[dimitri.b]

attached

[barthbradley]

What did the Toposurface get created from? It wasn't created from this DWG.  Anyways, the DWG and the Toposurface/SP/PBP/IO in the Site Project are miles apart from one another.   Keep in mind, Revit has a 10 mile limit.  You don't want to exceed that - or even be close.  

Anyways, my suggestion would be to start anew and Specify Coordinates at (Survey) Point (with SP UNCLIPPED) - before Linking in the DWG - and then link the DWG in via Auto - Shared Positioning. You want to enter x,y only - not z value. That should remain zero.  BTW: would you happen to know the approximate x,y coordinates/location of the Building within the Site Survey? If so, use those coordinates. 

Once the DWG is inserted, then create a Level at the Elevation of the Building Site Pad (or, if your RTE has one, move the default Level 2  up to the Building Site Pad).  265 meters from what I see here.  I would name the Level (and Views) something, such as "Building 1 Level".   I would also name Level 1 (and Views) something. Seems to me "Sea Level" would be a good designation.     

Now, open your Building Project and move all the Survey Point (CLIPPED) and Project Base Point Markers to the Internal Origin. Place their centers smack dap on top of the IO center point.  Check all Views to verify.  Once done, zero out Level 1.  You want to have Building Level 1 read 0.  Any other levels will originate from zero (0).  

Save and Close.

Now, link the the Building Project into the Site Project, go to Elevation View and Align the Link's Level 1 to the Level created at 265m. Then in a Plan View that captures the Building, as well as the DWG Survey info, move the Building Link in the x,y direction to where it belongs in relationship to the Survey. Rotate the Building Link to the correct orientation on the Site as well.   Once positioned and oriented, Publish Coordinates to a Named Site - such as "Building 1".  Save and close.  There's a few Save prompts. Be sure to answer yes to all.  

Now reopen the Building Project, Go to Location: Site Tab and make "Building 1" CURRENT.  Next, Link in the Survey Project via Auto-By Shared Coordinates.  Now the Site Link should be it the same relative position to the Building that it was at in the Site Project when you last closed out of it.   That's Relativity.   

Hope that helps.  

[barthbradley]

BTW: if the DWG is Linked in and saved correctly, you should see this Revit60 Default Location listed in the DWG's UCS Manager:  

[dimitri.b]

If you could pretty please do a little vid for me that would amazing. If not all good. I could try to work through

your worded guidance. 

To answer your question. Yes the toposurface was created using the contours on the survey dwg contours.

Cheers!

DB

[barthbradley]

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@dimitri.b wrote:

To answer your question. Yes the toposurface was created using the contours on the survey dwg contours.

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It couldn't have been created using the contour intervals in the DWG - at least in the one you posted.  The contours in that DWG have no elevation.  

BTW: I can't do a video for you.  Sorry about that Chief.  

[dimitri.b]

If you turn on triangulation in the dwg file it is created at the appropriate elevation. No worries Champ.

[ToanDN]

Just redo it. Reset shared coordinates using the method above. Relink DWG, move and acquire coordinates.