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Forums >> Revit Building >> Technical Support >> Survey Point and UTM coordinates

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Sat, Jun 11, 2016 at 7:50:31 AM | Survey Point and UTM coordinates



alarife Avatar

Joined: Mon, Oct 6, 2014
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Hi everyone!

I am facing some anoying problems when triying to introduce real world UTM coordinates into my Revit Project. I will try to explain to you the project I am working on and the steps that I have taken. Any advice or suggestion will be welcome!

- I have created a base topography model in which several buildings model will be linked. All of them should share the same coordinate system.

- I have the UTM coordinates of one specific point of the site. Therefore, I have unlocked the survey point in the topography model and I have introduced the UTM coordinates by using the tool "specify coordinates at point"

- After doing that, the survey point moves so far away, so I lock it again and I move it to the actual position that it has. It keeps the UTM coordinates.

- Following that, I link the other buildings' models and I publish the coordinates to them. I close and save their new location.

- The problem starts when I open the files of the buildings' models, the published coordinates didn't work well and their are not in the accurate position or neither have the values I have entered in the base model. I guess that it has something to do with the lock/unlock of the project base point and survey points of the base and lincked models.

Any opinions about this issue and the workflow??


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Mon, Jun 20, 2016 at 8:50:02 PM | Survey Point and UTM coordinates



crwinchester Avatar

Joined: Sat, Sep 4, 2010
173 Posts
4 Stars: 5 Votes

This is a tricky issue. My prefered workflow is to begin with a survey CAD file from a civil engineer. These files typically have the survey origin for the project in world coordinate space. Then I create a project standards or site model file where I import the CAD file and aquire the coordinates. This will then give me the correct corressponding origin in Revit space. Then I link in the building models and place them at the desired origin relative to the survey then publish those coordinates to the linked file. Save these locations back to the link and you'll have established the shared coordinates for the project. The advantage here is that you don't have to do much with unlocking the survey and project origin points in the models - they can remain distinct and hopefully operate mainly in their default location. This is a deeper topic than what I've described here and I'm sure others have better workflows, but I hope this helps. Cheers.

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