idea Interpolate between Z values in Edit Vertices in ArcGIS Pro Ideas

Interpolate between Z values in Edit Vertices

JoeMorgan2434 — Fri, 14 Feb 2025 00:07:19 GMT

In ArcMap, you could edit z values of a polyline by selecting a group of vertices and use the "nan" command to force the selected vertices to interpolate between adjacent vertices. It appears this same functionality is not included in ArcPro. This is a very critical command in our hydro flattening process to allow for manual adjustments to centerlines of streams.

Re: Interpolate between Z values in Edit Vertices

AyanPalit — Thu, 13 Feb 2025 18:22:33 GMT

@JoeMorgan2434 Thanks for the idea post.

Hope you reviewed the options as documented at: Edit 3D features

Also, the tools referenced at Update route measures have some z-editing options. Perhaps they will help in your case.

Re: Interpolate between Z values in Edit Vertices

JoeMorgan2434 — Thu, 13 Feb 2025 18:41:40 GMT

The edit 3D features appears to be talking about interaction with ground surfaces and not relative to z values already defined within a polyline.

Not sure about the route measures. I see comments about interpolation but looks to refer to XY coordinates. It also mentions using "NaN" calculation but again looks to be on route measures and even mentions a totally separate tool. I tried the Define Line Portion, but was not able to apply interpolation.

It would make sense to have the same functionality of ArcMap where you could quickly interpolate within Edit Vertices on the fly. I would think this is a simple update that could be done by just adding what was already working in ArcMap.

Re: Interpolate between Z values in Edit Vertices - Status changed to: Needs Clarification

JMutunga — Thu, 13 Feb 2025 22:29:53 GMT

@JoeMorgan2434 Could you please share a screenshot of the 'NaN' command in ArcMap that you mentioned?

We have the Update Z Values command within Edit Vertices in ArcGIS Pro (also mentioned briefly in the resource @AyanPalit provided above) but it updates selected vertices Zs with the same value... but I assume this is not quite the interpolation you are looking for.

Re: Interpolate between Z values in Edit Vertices

JoeMorgan2434 — Thu, 13 Feb 2025 23:04:49 GMT

Correct, that will set all selected vertices to the value input. In Arc you would do these same procedure but enter "nan" for the z value. Then deselect the line and then reslect the line. Those previous selected vertices would now have interpolated values.

Re: Interpolate between Z values in Edit Vertices - Status changed to: Open

JMutunga — Thu, 13 Feb 2025 23:15:16 GMT

Thanks @JoeMorgan2434. I now understand your request/workflow.

Re: Interpolate between Z values in Edit Vertices

JeffPietschSIA — Fri, 05 Jun 2026 22:21:39 GMT

Did you ever find a way to do this in ArcGIS Pro?

Re: Interpolate between Z values in Edit Vertices

JoeMorgan2434 — Mon, 08 Jun 2026 12:09:38 GMT

No, I haven't. Unfortunately, I'm still reverting to ArcMap that is unsupported.