Coordination between Revit and Civil 3D - link topography - BIM360DOCS

[Anonymous]

Hi everyone,

I have a coordination problem with the function "link topography" in Revit

Firstable; to correctly import a civil3D surface in Revit the only way is the new feature in Revit2019, that is link topography. This is the only way, beacause if you recreate the surface with LANDxml in Revit or with other way, Revit will create a bad surface, beacause Revit redoes the triangles of the surface. Furthermore Revit will close the hole in the surface.

So, the only way is link Topography funciton.

But this funcion requires A360DOCS (I DON'T KNOW WHY, beacause i have bougth a lot of licences of Revit and Civil 3d, also navisworks etc.. and then, for connect properly two Autodesk software, i have to pay another time to buy A360! WHY i cannot pubblish the civil surface to my local server????)

Anyway, i can buy also A360DOCS, but i have some problems of coordination, i don't know if i do some mistakes or if there is a problem with Autodesk. 

I do these passages when i want to coordinate the topography:

- I open a new revit file

- I change the coordinates of survey point with also the rotation of North. Due to have the real coordinates in Revit, and it works well, in fact if i import a georeferenced DWG file it goes in the rigth position.

- the i pubblish the topography from civil 3D to A360DOCS

- i open the revit file and i link the topography from A360DOCS

- There are no options to select, in fact i cannot choose between "origin to origin" or "shared coordinates" etc.. Revit do what he wants. i link the topography and revit say that the two coordinates of the file are different, but then it put the topography in the rigth position.

- the problem is when i try to "reload" the topography from "manage links". In fact if i reload it, Revit moved the survey point in a undefined position. And every time i reload it, it changes the coordinates of the file. For example:

original coordinates of N/S is 120000, when i reload, it moves it on N/S 250000, if i reload another time it moves the coordinates on 360000 ans so on.

I don't know why. And  i don't know if is a my procedural problem o something else. If somebody can help me i will be very grateful.

thak you very much and sorry for my bad english!

[samir_rezk]

Hi @Anonymous 

I am not seeing a drastically wrong workflow in your end but I want to share my workflow.. 

1. Use the shared reference point extension that is available for civil 3d and Revit. This will enable you have you Revit model seemlessly geo reference to match the Civil site plan.

To use the extension, you’ll need to turn transformation on in the drawing setting and define the shared point northing/easting and ensure the grid northing and grid easting is equal to that...

i understand that you actually do not need to do this if your publishing your surface but I’ve notice a better result!

in Revit, you must have your project in plan view level 1 and set to true north, and when you need to update it you should go to the link topography command not manage links!

2. The workflow requires bim 360 because the conversion from civil 3d to Revit is happening on Autodesk cloud server.. there is actually processing happening in the background...

hope this help help a little

[nikoue]

I can't answer for the new procedure as I don't have  A360DOCS, but if you give me point file and breaklines i can make for you a correct surface model in Revit, and align correct the coordinate systems.

[Anonymous]

HI, thank you for your time. your procedure i to recreate a surface in Revit? Because i have many surface, i have do all the earthworks in Civil 3D and then, with the phases, i have manage the drawings in Revit. Your intention is to recreate the surface in Revit? Because Revit doesn't recreate a correct surface, for example it close the holes, or it doesn't do the grade correctly. In the example Revit have closed the surface.

 

This is why i decided to use the new tool that create a link between the civil Surface with revit. Or you have a solution to recreate the same Civil surface in Revit? thak you!!

[nikoue]

I can recreate correctly the surface in Revit. I know what Revit can do. Send me a pm with a sample of your data and I will recreate it for you. If you like it I will show you. I can't just write here the procedure. I must show you. I need point file breaklines and if you have a boundary.

[Anonymous]

Thanks you for your answer, i will try the shared reference point. Then, for the suggestion of not use manage links, i don't know waht you refer to. If i use link topography tools instead of manage link, Revit say to me that there are two identical istance in Revit, and the it move the survey point anyway. 

I don't know that Autodesk do a conversion in cloud. But i think that should be more simple to link Revit and Civil 3D, this is the base of collaboration, and also it's internal at the same software-house! this is the thing that i don't understand. 

[michael.howardPRATB]

It's a bit of a pain that BIM360 or some alternative to this extension isn't included in the AEC collection. My normal procedure for surfaces from C3D to Revit is to build them off contours and points. This takes ages considering how simple it is. As getting IFCs to work properly in civil 3d is a bit of a nightmare, a lot of our IFC surface models for small sites have to be done through Revit but not enough to justify a BIM360 licence.

[Anonymous]

Yes, i'm in sccording to you. A360 should be included in AEC pack. Or also a simple version to coordinate revit and civil. Is not admissible that revit and civil aren't coordinate! 

[michael.howardPRATB]

I'd be great in my field. Right now combining combining real work site information and structures is pretty tricky. If Autodesk could get their IFC importing into C3D more streamlined this wouldn't really be an issue for us beyond Lidar and photogrammetric work where we sometimes need both. 

[JMODELICAL]

Hello Stefano,

I think that the problem you are experiencing is caused by the misinterpretation of the decimal separator that Revit/Desktop Connector does.  Go to Windows Regional Settings and set the point as decimal separator, as explained in this post: 
https://www.modelical.com/en/civil-3d-revit-topography-link/

I think that this will fix your problem. 
Best,
Javier