Unique value renderers

Question

Hello, My goal is to achieve this: However what I'm currently getting is this: The issue is that I cannot find any information on how to apply unique value classes into the render. Currently I'm just making a ramp and applying it, but that doesnt group values and includes (of which there are none). CIMUniqueValueClass[] landcoverClasses = new CIMUniqueValueClass[] { new CIMUniqueValueClass { Values = new []{new CIMUniqueValue { FieldValues = new []{ "0" } } }, Label = "Cleared" }, new CIMUniqueValueClass { Values = new []{new CIMUniqueValue { FieldValues = new []{ "1" } } }, Label = "Low Vegetation" }, new CIMUniqueValueClass { Values = new []{new CIMUniqueValue { FieldValues = new []{ "2", "3" } } }, Label = "River, Waterway" }, new CIMUniqueValueClass { Values = new []{new CIMUniqueValue { FieldValues = new []{ "1" } } }, Label = "Forested" }, new CIMUniqueValueClass { Values = new []{new CIMUniqueValue { FieldValues = new []{ "2" } } }, Label = "Road" }, new CIMUniqueValueClass { Values = new []{new CIMUniqueValue { FieldValues = new []{ "1" } } }, Label = "Medium Vegetation" }, new CIMUniqueValueClass { Values = new []{new CIMUniqueValue { FieldValues = new []{ "2" } } }, Label = "Swamp" }, }; .... var colorRamp = new CIMFixedColorRamp(); var colors = new List<CIMColor>(); foreach (var cls in landcoverClasses) switch (cls.Label) { case "Cleared": //0 colors.Add(CIMColor.CreateRGBColor(255, 0, 0)); break; case "Low Vegetation": //1 colors.Add(CIMColor.CreateRGBColor(76, 230, 0)); break; case "River, Waterway": //2,3 colors.Add(CIMColor.CreateRGBColor(0, 92, 230)); break; case "Forested": //4 colors.Add(CIMColor.CreateRGBColor(255, 170, 0)); break; case "Road": // 5 colors.Add(CIMColor.CreateRGBColor(110, 110, 110)); break; case "Medium Vegetation": //6 colors.Add(CIMColor.CreateRGBColor(0, 115, 76)); break; case "Swamp": //7 colors.Add(CIMColor.CreateRGBColor(115, 223, 255)); break; default: colors.Add(CIMColor.CreateGrayColor(130, 100)); break; } colorRamp.Colors = colors.ToArray(); UniqueValueRendererDefinition uvr = new UniqueValueRendererDefinition() { ValueFields = new string[] { "LANDCOVERTYPE" }, ColorRamp = colorRamp }; var cimRenderer = featureLayer.CreateRenderer(uvr); featureLayer.SetRenderer(cimRenderer); ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ Any help would be appreciated. Thank you.

CharlesMacleod · Answer

When I'm trying to figure out a CIM thing like this I like to replicate the action (if I can) in the UI and then look at the resulting XML in the debugger. var def = renderer.ToXml(); like so. You can even copy/paste the xml into an xml editor with colorization if the debugger xml viewer is not adequate. From the xml I look at what changed to tell me what to replicate in the code. Try fiddling with the renderer, for example, and examining the change in the debugger. There is also a utility here: https://github.com/Esri/arcgis-pro-sdk-cim-viewer that allows you to do just that. Anyway, the bit you really care about 😉 CIMUniqueValueRenderer renderer = ....; foreach (var group in renderer.Groups) { //let's make half the number of classes... List<CIMUniqueValueClass> classes = group.Classes.ToList(); List<CIMUniqueValueClass> groupedClasses = new List<CIMUniqueValueClass>(); CIMUniqueValueClass currentClass = null; var count = 0; while (count < classes.Count) { //even or odd? if ((count % 2) == 0) { currentClass = classes[count++]; } else { var odd_class = classes[count++]; currentClass.Label = $"{currentClass.Label};{odd_class.Label}"; //this is the key bit - consolidate the array of unique values for the class var values = currentClass.Values.ToList(); values.AddRange(odd_class.Values); currentClass.Values = values.ToArray(); groupedClasses.Add(currentClass); currentClass = null; } } //one left over? if (currentClass != null) groupedClasses.Add(currentClass); //re-assign group.Classes = groupedClasses.ToArray(); } layer.SetRenderer(renderer); ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

DrewD · Answer

Thanks Charles, that makes the symbol fill transparent. How can I group unique values together so that they share symbology?

CharlesMacleod · Answer

Try this. var renderer = layer.CreateRenderer(uvr_def) as CIMUniqueValueRenderer; foreach (var group in renderer.Groups) { foreach(var valueClass in group.Classes) { var symbol = valueClass.Symbol.Symbol as CIMPolygonSymbol; foreach (var symLayer in symbol.SymbolLayers.OfType<CIMSolidFill>()) { ((CIMSolidFill)symLayer).Color.Values[3] = 0;//set the alpha channel to 0 } } } layer.SetRenderer(renderer); ‍‍‍‍‍‍‍‍‍‍‍‍‍‍