topic Re: Can’t display classified raster in ArcGIS Pro 3.3 in ArcGIS Pro Questions

Can’t display classified raster in ArcGIS Pro 3.3

LizLotz_mc2 — Tue, 11 Jun 2024 23:22:02 GMT

For some reason I can’t display an raster elevation DEM layer in ArcGIS Pro 3.3 using the Classify symbology. It displays without a problem using the Stretch symbology, but when I select “Classify” instead, it immediately starts “Generating unique values” which runs for awhile. Then, I get an error. I tried increasing the number of values in Options up to 100,000,000, but I still get the error. And, the Statistics don’t show up in the Symbology Pane. The Statistics are shown in the Layer Properties however. See the screenshots below.

When I do the same thing in ArcMap 8.2, I can select the the Classified display and specify the # of classes and class breaks for display, and view the histogram and statistics.

Why is this simple raster display a problem in ArcGIS Pro??

Re: Can’t display classified raster in ArcGIS Pro 3.3

DanPatterson — Wed, 12 Jun 2024 00:16:14 GMT

way at the bottom of this link

Change the symbology of imagery—ArcGIS Pro | Documentation

describes Classified

I would suggest using anything other than Classify in your last image. you elevations are floating point and setting the number of classes to more than 10 classes isn't going to make it look better

Re: Can’t display classified raster in ArcGIS Pro 3.3

LizLotz_mc2 — Wed, 12 Jun 2024 00:32:40 GMT

Thanks Dan, I appreciate the suggestion. But the purpose of my post is not to ask about symbolizing floating point elevation data in general. I'm trying to understand why a basic raster display option is not working in ArcGIS Pro. What I really was trying to do is use a 2 class raster display in ArcGIS Pro to quickly visually show elevations above and below a specific value to get an idea of upland vs wetland in a particular area. This is a simple classification that I have done many times in ArcMap, so why not in ArcGIS Pro?

Re: Can’t display classified raster in ArcGIS Pro 3.3

DanPatterson — Wed, 12 Jun 2024 00:48:55 GMT

The default in the Project backstage, Raster and Imagery, did you set the maximum number of unique values there as well? the default is 65536, perhaps throwing the 100m in symbology throws the warning.

Pro display engine isn't the same as arcmap's so I wouldn't expect them to behave exactly the same

Re: Can’t display classified raster in ArcGIS Pro 3.3

Robert_LeClair — Thu, 13 Jun 2024 21:40:08 GMT

There is BUG-000167647 - "Issues with classifying the symbology of a raster dataset using continuous floating-point values in ArcGIS Pro 3.3" It's scheduled to be fixed in ArcGIS Pro 3.4 later this year. Workarounds include:

Use the Apply Symbology From Layer tool to import the symbology from a similar layer.
Edit the 'Maximum number of unique values to display' parameter within the Raster and Imagery ArcGIS Pro options.

Re: Can’t display classified raster in ArcGIS Pro 3.3

LizLotz_mc2 — Thu, 13 Jun 2024 22:59:36 GMT

Good to know this is a known issue scheduled for a fix. Thanks!

Re: Can’t display classified raster in ArcGIS Pro 3.3

ICONEngineering — Tue, 16 Jul 2024 23:56:19 GMT

i was having the same issue, but once i change it to 100 Million then my problem was solved! Thank you Dan for your help!

Re: Can’t display classified raster in ArcGIS Pro 3.3

idcrickmore — Mon, 19 Aug 2024 21:51:04 GMT

This is still broken.

Re: Can’t display classified raster in ArcGIS Pro 3.3

Robert_LeClair — Tue, 20 Aug 2024 17:49:44 GMT

Correct. This was BUG-000167647 that was detected in the ArcGIS Pro 3.3 application - which is the current version of ArcGIS Pro 3.x. I did see that the BUG is fixed and will be deployed when ArcGIS Pro 3.4 is released later this year.

Re: Can’t display classified raster in ArcGIS Pro 3.3

CorrineCoakley — Thu, 26 Sep 2024 23:29:33 GMT

I had high hopes, but nope, it isn't fixed. This makes it seriously difficult to symbolize multiple NDVI rasters with scientific values from -1 to 1. ArcPro won't let me set those class limits because I don't have values that go all the way to -1.

Re: Can’t display classified raster in ArcGIS Pro 3.3

Robert_LeClair — Wed, 16 Oct 2024 16:49:42 GMT

I can confirm that BUG-000167647 is fixed at ArcGIS Pro 3.4 which is scheduled to be released Q4 2024.

Re: Can’t display classified raster in ArcGIS Pro 3.3

ricardoaravena — Tue, 29 Oct 2024 05:49:40 GMT

This bug didn't exist in 3.2. How is it that ESRI is including bugs in their updates?

Now I have to uninstall and roll back.

Re: Can’t display classified raster in ArcGIS Pro 3.3

adminJDN — Thu, 12 Dec 2024 12:05:02 GMT

@Robert_LeClair

~~BUG-000167647: ain't fixed.~~

~~Still broken in 3.4~~

Re: Can’t display classified raster in ArcGIS Pro 3.3

LizLotz_mc2 — Wed, 11 Dec 2024 15:23:36 GMT

That is disappointing! I had hoped this would be fixed as planned at 3.4.

Re: Can’t display classified raster in ArcGIS Pro 3.3

Robert_LeClair — Wed, 11 Dec 2024 15:27:18 GMT

I'm looking at the Esri Support Services internals for BUG-000167647 and it shows fixed at ArcGIS Pro 3.4 although from your message it appears not to be fixed. The workaround at 3.3 was:

Use the Apply Symbology From Layer tool to import the symbology from a similar layer.
Edit the 'Maximum number of unique values to display' parameter within the Raster and Imagery ArcGIS Pro options.

I'd recommend reaching out to Esri Support Services to create a case for the analyst to investigate.

Re: Can’t display classified raster in ArcGIS Pro 3.3

adminJDN — Thu, 12 Dec 2024 16:07:39 GMT

I need to correct myself. Sensu strictu, the bug has been fixed. It is possible to use Classify renderer for single band in v3.4.
Although there is no backward compatibility with projects created earlier (v3.1)

Re: Can’t display classified raster in ArcGIS Pro 3.3

LizLotz_mc2 — Fri, 27 Dec 2024 17:35:47 GMT

Thanks for clarifying