idea Option to center a symbolization scheme around zero in ArcGIS Pro Ideas

Option to center a symbolization scheme around zero

AmberMillison — Thu, 15 Sep 2022 15:02:23 GMT

In the Graduated Colors symbology type, there are several color schemes that range between two colors, with the center of the color ramp being white (for example, the Red-Blue set of color schemes ranges from red to blue, with white in the center). This type of color scheme is really useful when displaying a range of values that include both positive and negative numbers, because the pure white color can be set to a value of zero while the red shades can represent numbers below zero (-) and blue can represent numbers above zero (+) (or vice versa). I typically have to manually go in and change these class breaks so that the red/blue shades have equal intervals in the positive vs. negative direction. This way, colors can directly be interpreted and compared on the map in terms of there absolute value and sign. ArcGIS Pro does not offer an option to automatically set the center of a color ramp to zero and equally distribute values into classes on either side, however I think this would be helpful for quick visualizations of variables that range from positive to negative. In my case, I am specifically looking at changes in precipitation which naturally may be positive or negative, but this type of color scheme could be useful for a variety of purposes.

Re: Option to center a symbolization scheme around zero - Status changed to: Needs Clarification

CraigWilliams — Wed, 14 Sep 2022 18:35:06 GMT

Have you explored setting 0 as the critical break? See description of critical breaks in this topic: https://pro.arcgis.com/en/pro-app/latest/help/mapping/layer-properties/graduated-colors.htm

Re: Option to center a symbolization scheme around zero

AmberMillison — Thu, 22 Sep 2022 16:01:38 GMT

@Craig Awesome, thanks for your reply! I never knew this was possible and I'll try play around with it now. Do you know if it works best if I set the white class to a value of zero first, then set this class as the critical value?

Re: Option to center a symbolization scheme around zero

CraigWilliams — Tue, 27 Feb 2024 01:07:49 GMT

Do you know if it works best if I set the white class to a value of zero first, then set this class as the critical value?

Generally classify first, set the critical break, and then apply symbology.

Re: Option to center a symbolization scheme around zero - Status changed to: Already Offered

CraigWilliams — Tue, 27 Feb 2024 01:08:00 GMT

Re: Option to center a symbolization scheme around zero

tuilbox — Thu, 20 Feb 2025 08:49:21 GMT

Hello,

I am not finding the option to Set critical break - though I would love to! FWIW, I'm currently working in 3.3.0. I right-click on the class, or right-click on the histogram and I only see the following:

Please advise.

Thanks!!