topic Re: Splitting Tool Issue - difference between split and where asked to split in ArcGIS Pro Questions

Splitting Tool Issue - difference between split and where asked to split

AshleePoeppmann1 — Fri, 28 Mar 2025 00:21:49 GMT

Hi all, I'm having issues when I to use the split tool.

I want to split the polygon with the enclosed lines below (the dark blue).

However, after a successful split, my topology I had created had identified a gap between the line and where the polygon was actually split, so I zoomed in there is a difference between where the line is and where the polygons have split:

Yes I's a very small difference, 0.13m, but my topology rules pick it up (Boundary Must Be Covered By).

I'm in ArcGIS 2.9.5 but I have tested in 3.1 and the same thing happens.

Both the map and these shapefiles are in the same coordinate system, GDA2020.

Is there anything I'm missing / could be doing to correct this?

Re: Splitting Tool Issue - difference between split and where asked to split

DanPatterson — Thu, 08 Feb 2024 00:18:02 GMT

Try a featureclass in a file geodatabase rather than a shapefile.

Re: Splitting Tool Issue - difference between split and where asked to split

AshleePoeppmann1 — Thu, 08 Feb 2024 01:05:23 GMT

Hi Dan thanks for that suggestion. Just tried it, unfortunately still creating a tiny gap. 😞

Re: Splitting Tool Issue - difference between split and where asked to split

Scott_Harris — Thu, 08 Feb 2024 15:35:40 GMT

@AshleePoeppmann1

I tried to replicate your scenario in 3.2 with out of the box resolution/tolerance values and I can't reproduce a gap that is picked up by the Topology and read as a 'Boundary Must be Covered By' error.

I have the map and data in GDA2020. The polygon and line feature classes both use the following XY Resolution and XY Tolerance:

The Topology uses this XY Cluster Tolerance:

Are your values any different?

-Scott

Re: Splitting Tool Issue - difference between split and where asked to split

AshleePoeppmann1 — Tue, 20 Feb 2024 01:47:56 GMT

Hi Scott, thanks for testing this for me. I changed the XY Cluster Tolerance in the topology and this has worked as a fix to stop topology errors. While I can still see a gap I'll just ignore it for now.

Realised I uploaded the wrong 2nd screenshot, so see below:

Re: Splitting Tool Issue - difference between split and where asked to split

Scott_Harris — Tue, 20 Feb 2024 13:51:40 GMT

@AshleePoeppmann1 it's great that you have a way forward for now. If you want to investigate it more, my suggestion would be to contact Esri Technical Support as they can help narrow down if Split is causing features to move a greater distance than the XY Tolerance defined on the dataset (it shouldn't).