topic Re: Attribute Driven symbology in ArcGIS Pro Questions

Attribute Driven symbology

SLouq — Thu, 21 Apr 2022 15:59:01 GMT

I have a map which which has a number of points on it. Each point will hold a value which will be input by a worker in the field. I want to create color coded symbology based on a range of numbers, (ie 0-499, 500-999, etc.) How can I do this in ArcGIS Pro? I know how to do it based off of numbers already in an attribute table but how do you set up symbology for a feature service which hasn't been updated yet?

The idea is once I get it working in ArcGIS Pro on my desktop then I can transfer it over to a web map accessed through Collector by the workers in the field. Can anyone help me with this?

Re: Attribute Driven symbology

JesseWickizer — Wed, 27 Apr 2022 16:09:00 GMT

You'll want to use graduated colors symbology, and you'll have to temporarily create some dummy points first. Then it sounds like you know the process from there...

Identify how many symbol classes you need - create that many temporary points in your feature class.
Populate the temporary points with different values covering the full range of possible future values.
Open the Symbology pane and change to Graduated Colors.
Assign the field and proper number of classes.
Adjust the Upper value in each class to define each symbol class range.
Update the class labels as necessary.
Delete temporary points and publish the feature service.

Re: Attribute Driven symbology

SLouq — Wed, 27 Apr 2022 16:22:17 GMT

Is there a way to create a template in ArcGIS Online to hold the ranges and assign the colors to the ranges in the template. Then have a web map reference that template?

The hosted feature layer which will hold the features already exists in ArcGIS Online and I am trying to use that feature layer instead of creating a new one in ArcGIS Pro and then sharing it as a web layer

Re: Attribute Driven symbology

RhettZufelt — Wed, 27 Apr 2022 17:59:08 GMT

you could set up the symbology with arcade in the web map to assign a "category" to each feature based on the range of values. Here is example categorizing feature based on the StreetAddress range:

if ($feature.StreetAddress > 0 && $feature.StreetAddress <= 100){ return "One" } else if ($feature.StreetAddress > 100 && $feature.StreetAddress <= 200){ return "Two" } else if ($feature.StreetAddress > 200 && $feature.StreetAddress <= 300){ return "Three" } else if ($feature.StreetAddress > 300){ return "Maxed" } else { return "No Value" }

Then the Unique symbology is set up with symbols for "One", "Two", "Three", etc.

If you already have the entire range in the data, you should be able to symbolize by it. If not, you can add what you have, then modify the JSON of the webmap drawingInfo to add the missing categories to the symbology/legend.

Re: Attribute Driven symbology

SLouq — Thu, 28 Apr 2022 19:25:55 GMT

taking dummy points and specifying symbology at the ranges I needed in Counts and Amounts (color) seemed to do what I was trying to accomplish!

Thank you so much for your help!