four color theorem for symbolization | ArcGIS Pro 2.0?

[VincentLaunstorfer]

Hi,

Since ArcGIS Desktop 9, I always found the four color theorem great to symbolized to depict layers with a lot of polygons (such as census tracts) so that no two adjacent polygons have the same color. It used to be called "Map Coloring - Four Color a Map" and basically applied the 4-color map theorem to a polygon file by adding a column with integers. Howerver, it never really worked under ArcGIS Desktop 10 and was desperate to use it again, as explained here:

https://community.esri.com/thread/27844 

I now installed ArcGIS Pro 2.0 and perhaps ESRI included this symbolization style in their new GIS desktop application? For the time being, I cannot find anything such as "4-color map" tool... Is it somewhere included? Or is there any workaround or script with the new ArcGIS Pro 2.0?

Thanks

[danashney]

Would need to modify the script a wee bit from 2.x to 3.x if you want it in Pro...

https://gis.stackexchange.com/questions/54029/how-to-apply-the-four-colors-theorem-in-a-polygon-map-...

[GerryGabrisch]

This Python code seems to work just fine.  There are heaps of possible contingencies with polygons so any errors would interest me.  https://github.com/LummiGIS/Four-Color-Map-For-GIS