topic Re: Describe Field Name? in ArcGIS Pro Questions

Describe Field Name?

Davec43 — Thu, 23 May 2024 10:58:29 GMT

Currently the workflow is to split two different Feature Layer by an attribute which produces a lot of separate layers. Then use arcpy.Describe to apply symbology to the based on the layer type (point/Line).

act_map = aprx.activeMap map = aprx.listMaps("Map1") layers = act_map.listLayers() for lyr in layers: if(arcpy.Describe(lyr).dataType)=='FeatureLayer': if arcpy.Describe(lyr).shapeType=='Point': symbology = lyr.symbology symbology.updateRenderer("SimpleRenderer") symbol = symbology.renderer.symbol symbol.color = {"RGB": [169, 0, 230, 100]} symbol.outlineColor = {"RGB": [0, 0, 0, 100]} symbol.size = 6 symbol.outlineWidth = 1 lyr.symbology = symbology # "re-set" property symboloy

This works but now we're adding another Feature Layer (Point) that will require separate Symbology. I have the idea to use "Fieldnames" to differentiate the two but can't figure it out.

Re: Describe Field Name?

Davec43 — Thu, 23 May 2024 13:48:09 GMT

I went to arcpy.ListFields(lyr) and was able to easier differentiate between the different point layers.

act_map = aprx.activeMap map = aprx.listMaps("Map1") OPField = "xxxx" for lyr in layers: fieldList = arcpy.ListFields(lyr) for field in fieldList: if field.name == OPField: symbology = lyr.symbology symbology.updateRenderer("SimpleRenderer") symbol = symbology.renderer.symbol symbol.color = {"RGB": [169, 0, 230, 100]} symbol.outlineColor = {"RGB": [0, 0, 0, 100]} symbol.size = 6 lyr.symbology = symbology

Re: Describe Field Name?

JoshuaBixby — Thu, 23 May 2024 14:31:24 GMT

As I commented to your question over at GIS SE: arcpy - Describe Field Name? - Geographic Information Systems Stack Exchange.

According to Field - ArcGIS Pro | Documentation, "Field properties can be accessed through the ListFields and Describe functions." If you already have a Describe object for a layer, e.g., desc = arcpy.Describe(layer), retrieving the fields property will return a list of Field objects: desc.fields.