Revit 24 - Toposolid - How to unite a region of topography that was previously separated from the rest of the surrounding topography?

[lu_cas_alves]

How to unite a region of topography that was previously separated from the rest of the surrounding topography? I separated an area of the land where the architectural project will be carried out from the rest of the topography, so that when I change the contours of my terrain, the contours outside the terrain would not change. I happen to want to modify the region of my terrain, and the problem is that I can't merge the region that was previously separated with the rest of the existing topography of the surroundings (I reasoned that I need to merge two regions so that I can redraw the area that will be separated again ). Can someone help me?

[MichaelDol]

This is the big disadvantage of the new tool, the detached part is now impossible to attach.

[lu_cas_alves]

That is an absurd, I wrongly designed the land on which an architectural project will be made and I would need to adjust it, are you telling me that I will have to create a project from scratch again just to fix this?

[l26583]

It appears that this happens only when you use a spline to slice.

[architects4]

Hi, I have this issue as I measure the topography of a site from several stations which results in seperate datasets these then need to be combined. I used to manage this easily with the old merge topography tool.

My current workaround is rather clunky but does work! I have the following workflow (which will also work to rejoin split toposolids)

• Create the seperate toposolids in Revit and get them aligned relative to each other
• Export to stl format
• Load into Blender
• remove all of the surfaces except for the top surface
• Export the points to a text file (using an excelent macro for Blender that I found with a web search)
• Create a new toposolid from CSV in Revit

Voila, only takes a mere few hours!

You can also fill in holes and gaps in a toposurfce like this and add pints in the CSV file to extend the new surface

It's a bit of a pain but quite flexible once you are familiar.

I guess someone with a full version of Revit could write a macro to export the points directly but I only have Revit LT (my turnover is too small to justify the full version which is a shame)

[Haider_of_Sweden]

Hello @lu_cas_alves and @architects4 

I got a solution that is a bit better, but still not the optimal solution that we all are looking for.

• Isolate the topography surfaces you want to merge.
• Export the scene to DWG - Both Solids or Mesh works
• Link the DWG back into Revit
• Now create a Toposolid from Import and pick the DWG you just imported.
• You can now erase the old ones

Please do vote on this post regarding merging toposolids. I am surprised that at the time I am writing this, only 15 votes, including mine, are to be seen.

https://forums.autodesk.com/t5/revit-ideas/merge-toposolids/idi-p/12225905

[architects4]

Hi Haider,

This is an interesting solution.
I will definitely try this. It sounds much simpler than my method using Blender!

Peter

[handjonathan]

Hi @architects4 

Thanks a lot for posting your question to the forums!   I hope the suggestion by @Haider_of_Sweden works for you. Please let us know if successful. 
 
We look forward to hearing back from you with more information so we can help you as a community! 

[bengalik]

Haider_of_Sweden,

When I create the Toposolid from the Imported DWG,  all of the points have a z value of 0 - the new Toposolid is flat.

Any idea what I'm doing wrong?

[luizfelipecesario]

I used to do topography work in just a few minutes with the ground points. I could align with the walls, wouldn't accidentally move the terrain because instead of moving the point, I move the terrain... I could SEE the points I wanted to align with a reference plane... All this in exchange for a "better representation" and digging holes under the ground. Things that I bet not even 5% of users need... Congratulations, they messed up one of Revit's most powerful tools.

[giorgioMZL6L]

@handjonathan Can someone at Autodesk address this issue?

RE: Inability to merge topo solids after they have been split?!? This is a huge oversight. Its the only way to work with topography effectively on slightly larger sites/ more complex sites with more points. Not to mention anything bigger!!!

Secondly, the fact that subdivisions cant exist with a +0.000 elevation is also insane to me. I have seen some forums asking for there to be an ability to go negative in elevation as well which i think is a great idea.

This should definitely be a hotfix at this point. 2 years of no improvement is crazy. 

[geovanna_martins6R43N]

Olá @Haider_da_Suécia! Obrigada pela sugestão! Tentei fazer esse passo a passo por aqui, mas não consegui. Você poderia gravar um vídeo mostrando essas etapas? Acredito que eu tenha feito algo errado.

[cpayneXMMPL]

this solution worked for me, thx haider. still something that autodesk should work to resolve.