Bizaarre Graphics Artifacts

[DavidGray1]

Hello Community;  What causes such a strange graphics artifact? The attached image shows a long streak of almost parallel gray lines emanating from a polyline feature representing an Interstate Highway on its own feature layer. The artifact lines are in a west-southwest direction across the map to a east-northeast direction. I have narrowed down which polyline feature on which layer that the artifact is associated with. When I simplify the line type symbology, I can get it to go away, so its at least related to the symbology. The two gray artifact lines are not quite parallel and meet in a point. The artifact scales in and out along with zooming in and out, so the meet point moves as well.

It appears to emanate out from a sole and short segment of the polyline representing the highway. The thing is, I have several maps that have highways symbolized the same way and yet the artifact manifestation only occurs here with this one example. Why? And can it be fixed without changing symbology?   Dave

I am running Pro 3.x on a Windows 10 machine.
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[DanPatterson]

run the check on this link

ArcGIS Pro 3.4 system requirements—ArcGIS Pro | Documentation

you may be having graphics drivers issues if you are running an older machine

[ChristopherCounsell]

Try running the Repair Geometry tool, noting it will update your feature class (can copy it or run check geometry first if this is a concern).

I see a lot of behaviour like this when the data has geometry issues.

[ShaneONeill_144]

We've seen a few display/rendering issues in 3.4, I would suggest a clean uninstall and reinstall of Pro https://support.esri.com/en-us/knowledge-base/how-to-perform-a-clean-uninstall-and-reinstall-of-arcg...

[DavidGray1]

Well; I got an email from ESRI asking if I got the answer I needed. Not really. I am running Pro 3.2.2. My graphics driver is always up to date with the latest one downloaded and installed.

I found the simplest way to get of these bizarre graphics artifacts was to isolate and then just redraw the polyline entity and voila! artifact is gone. I discovered a second artifact and the same - just replacing it fixed it. But the question remains as to what causes these artifacts. Without that the underlying issue is not really solved.  Oh, well.   Dave

[DavidGray1]

" get rid of" should in there. It would be nice if the post could be edited.

[ChristopherCounsell]

If recreating the feature resolved the issue I'd strongly assume it is tied
to geometry errors. How were the features originally created?

Have you tried any of the suggestions in this post?

Check/repair geometry?

Update or reinstall Pro? Check system requirements are met? Or can try on
different machine (to help rule out if it's a computer, or data issue).

Cheers

Chris

[DavidGray1]

Hi Chris; Thanks for the thoughts.

The original feature was created through the edit/create command on the desired polyline feature layer. However, within that command, sometimes the tracing tool is used on another source polyline for the desired length and sometimes it is drawn vertex by vertex on a similar existing polyline or sometimes just freehand using an underlying topo geotiff as a guide. It depends on what is going on with the available info and the extent/length. Don't know if the two artifacts out of hundreds of drawn polylines were for sure connected with any of these methods. If it occurs again (likely), I'd like to try the repair geometry tool. I am not too familiar with that command, but it is almost always worth it to try something new.

The uninstall/reinstall option was recommended for 3.4 which I am not running at this point. I am using 3.2.2 which has been more than suitable for my needs. I don't do a lot of fancy online/portal/group type GIS work so I've been happy with Pro as it is right now with that version. I migrated to Pro from map several years ago and haven't looked back. I like it. In general my current project is quite large and the computer has no issues with that aspect, runs fast and calls up fast, etc. SSD hard drives are nice. Now if it keeps occurring and especially if it becomes more frequent, it will be time to attempt some of the other more involved and time consuming suggestions.

And thanks for the suggestions, I have also found most every issue can be solved on this community site with input from others. Thanks!   Dave

[DanPatterson]

There is

Check Geometry—ArcGIS Pro | Documentation

which just does the check and can be used as a precursor to the Repair Geometry tool.

It will give you a sense if there are any geometry issues so you can rule those out if that is the case.

[DavidGray1]

Thanks Dan;   Interesting to look into these available tools. There is so much "stuff" available one is never done learning. What is going on in the geometry background is still pretty mysterious, but so what. It is good that a check can be run before committing to having something maybe miraculously fixed....or not. Now I am hoping a similar artifact appears in order to try this out!   Dave     .....also sort of retired