This has worked in the past, not sure what its deal is now. Any help is appreciated :slight_smile: [image]

Or here is an alternative workflow using the MeshToolkit package. [image]

Hi @vanman It may be that the intersection points attained by the node are being sorted into an order that initiates the “Polycurve Curves my not be branching” error (I have dissected the node and its functions, and this appears to be the case) Can you post a screen capture of the topography? and w…

Hi Ewan, Will do my best to respond to what your saying, sorry if theres some confusion The topography doesn’t show up in Dynamo as it usually would after running the script. below is what it looks like in revit. No matter where i cut a section or elevation in it the node wont work as it usually w…

I extracted the nodes from within into a blank DYN, to determine where any error was occuring. Can you post your current DYN and a stripped version of the file?

I see, smart. I was wondering if dynamo had some sort of live progress function you could watch with. Here is the dyn and revit file with topo. Topography.rvt (2.3 MB) Existing Ground Lines_For Current View.dyn (10.3 KB)

When the DYN is executed in a Section view (that cuts the topography) it does find points along the surface, it just cannot create the Polycurve because of the “branching” effect of the point order being jumbled. This could be due to the roughness of the surface. You can work around this by using t…

Awesome! what package is the node “sort points by average vector” from?

The Sastrugi Package :wink: [image] Sastrugi Package - Updated Packages New Package Available. Introducing… [Logo Capture] Sastrugi should now be live in the Package Manager. Examples of use and more information can be found on the Package Website here: https://sites.…

Still getting Null values with the intersection with topography node :confused: [image]

What happens if you remove the List.FirstItem node that is after the Pick node? Also where is your section taken in relation to the topography? Can you show a plan view? (I am not sure the file you uploaded contained the same section you display in your examples, but correct me if im wrong)

Same deal without that node. Sorry you are correct I just opened a new file and copied the topo through to make it small enough to upload here. Topo in the original purged file is Below. The section view I just tried is “Section A1” under group “A Building Consent”. All the sections and elevations d…

Topography.IntersectionWithPlane

Ewan_Opie June 11, 2018, 5:01am 10

The Sastrugi Package

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Polycurve.curves not working with 2017.2? Revit	8	751	August 14, 2017
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Multiple lines do not follow the topography - Geometry.Intersect don't work as expected? Revit revit , mep , geometry , dynamo , topography	2	1352	November 21, 2017
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Topography.IntersectionWithPlane

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