topic Atributte Rules doesn't work correctly (Find Dangles check) in ArcGIS Data Reviewer Questions

Atributte Rules doesn't work correctly (Find Dangles check)

ammsgis — Wed, 25 Jan 2023 22:35:56 GMT

Hey people!
I need some help with Atribbute Rules issues. I created a rule Find Dangles with Dangle Tolerance 1000m, but returned too many inexistest errors.I know that because i compared with the Topology Rule Must not have dangles and in the middle of chart there was no errors, just in the edge. I realise the rule looks identify dangles in feature there are snapped.
I thank you in advance for the help,
Best regards.

Re: Atributte Rules doesn't work correctly

Jake_S — Tue, 17 Jan 2023 12:53:34 GMT

Can you provide the code you applied and examples of the errors you are receiving.

~jake

Re: Atributte Rules doesn't work correctly

JayCary — Tue, 17 Jan 2023 17:45:23 GMT

Hi,

Depending on your configuration, results from the Must Not Have Dangles topology rule and the Find Dangles check may not be directly comparable. You may want to verify that the Dangle Tolerance parameter makes sense for your data. From the doc:

The minimum distance to search for polyline nodes that are not connected to other features. Polyline features with nodes that are within this distance but not connected to other polyline features are returned as an error. The value must be greater than the input data source's x,y tolerance.

Jay

Re: Atributte Rules doesn't work correctly

ammsgis — Wed, 18 Jan 2023 13:07:07 GMT

Hi Jay!
Thanks for the answer, I guess understand, but why the tool identify every polyline nodes as dangles, when teorically the features are closed(snapped)?
The tool have to run this way or is there a way to change that?
Thank you again, my friend!
Best Regards.

Re: Atributte Rules doesn't work correctly

JayCary — Wed, 18 Jan 2023 19:16:08 GMT

Can you share the details of your configuration? For example, the check settings (input filters, dangle tolerance, dangle tolerance unit of measure, additional features to compare) and spatial reference of the input dataset.

You may want to also verify that the polylines are actually snapped to another feature and do not have micro-gaps.

Re: Atributte Rules doesn't work correctly

ammsgis — Sat, 21 Jan 2023 21:06:20 GMT

Feature closed but appeared in Error Inspector

Theoretically, there are no dangles in the feature, however, it is still identified in the rule. I noticed that as you increase the dangle tolerance, the rule starts to pick up more and more features that are already snapped.
If I used the tool wrongly tell me know, please.
Thank you one more time.

Rule parametersSpatial Reference

Re: Atributte Rules doesn't work correctly

JayCary — Wed, 25 Jan 2023 18:58:07 GMT

@ammsgis: Thanks for sharing your results and environment. This feature is flagged as an error since a node is within the dangle tolerance and not connected to another feature in the feature class.

To all: Would appreciate thoughts on whether polylines that close on themselves should be handled in a different way by the Find Dangles check.

Note: The Polyline or Path Closes on Self can be used to find self-closing polylines.

Re: Atributte Rules doesn't work correctly (Find Dangles check)

ammsgis — Thu, 26 Jan 2023 12:34:52 GMT

Thank for your help @JayCary !
Will this be possible in the future?
"Polylines that close on themselves should be handled in a different way by the Find Dangles check."