This is a lengthy explanation so I’ll do my best to break it down as much as I can, but in summary I was trying to develop a Dynamo graph that translates a Civil 3D surface between grid and ground coordinates using a surveyor provided combined factor. My first attempt was one where I simply modifie…

Hi @steven.v.costa , I tested this out and am getting the same results that you are. I went through the code pretty closely and can’t seem to find where the discrepancies are coming from. The only other thing I can offer is a different workflow: Create a block with the surface, making sure “Scale…

Hi @zachri.jensen , Well, that is a much simpler workflow! Glad that you were able at least to verify that the python node seemed sound but I’ll give the workflow you suggested a go and see how it works out. Thanks!

@zachri.jensen I was able to work out a python node that executed what you recommended and it looks to be correct, so thanks again! I was definitely over-complicating the process. I’m going to run it by our geomatics team for verification, but strictly from a Civil 3D perspective, the surface elevat…

Thanks Paolo! Didn’t know about that node, so I ended up adding it in a Python node, but will definitely make use of that in the future. [image]

Perhaps not as sophisticated but… if you can extract the LandXML, you can just edit the values of the coordinates and write a new file. [image]

Wow, this is great, thank you Paolo. I’m going to try and implement this as well, but even beyond this use case, I can picture this type of workflow being extremely useful.

[image] steven.v.costa: I was able to work out a python node that executed what you recommended and it looks to be correct Glad to hear!

Civil 3D Grid to Ground Surface Conversion - Unexpected elevation values

Civil 3D

Paolo_Emilio_Serra1 December 14, 2020, 6:31pm 4

For scaling a BlockReference via Dynamo Scale Existing Block by Block Attribute

1 Like

Topic		Replies	Views
Truncating a Civil 3D surface Civil 3D	7	216	October 15, 2023
Is it possible to find max or min elevation in specific area Civil 3D dynamo , civil3d	9	563	August 29, 2025
Dynamo with Civil 3D Surface Civil 3D dynamo , civil3d	12	6758	August 21, 2024
Spot elevation difference Dynamo Civil 3D	15	468	March 11, 2026
How to convert from DynamoNodes.surface to DesignScript.Geometry.Surface Civil 3D	4	907	July 9, 2020

Civil 3D Grid to Ground Surface Conversion - Unexpected elevation values

Related topics