I have to render a feature layer with a graduated colors renderer, using the ArcGIS API for Java (or VB, .NET).

As the feature layer data is created dynamically using webservices, I don't in advance the range of values, so I need to get the classification to be generated using the natural breaks algorithm.

Here is what I need to set:

Layer properties window

In addition, I need to get the largest values overlaying the smallest:

Symbol level dialog

I need to get n classes, using a AlgorithmicColorRamp from one given color to another color and symbolized by a simple line with a given width.

I tried to write this method, called after the layer data source is set:

    public static void applyGraduatedColorsLineRenderer(IGeoFeatureLayer geoFeatureLayer, String field, int count, IColor fromColor, IColor toColor, double width) throws UnknownHostException, IOException {
    IAlgorithmicColorRamp colorRamp = new AlgorithmicColorRamp();
    boolean[] ok = new boolean[1];

    ClassBreaksRenderer classBreaksRenderer = new ClassBreaksRenderer();

    for(int i = 0; i < count; i++) {
        SimpleLineSymbol simpleLineSymbol = new SimpleLineSymbol();
        classBreaksRenderer.setSymbol(i, simpleLineSymbol);


The problem is that I don't get the right range for my data, and the classification method is set to "manual" instead of "Natural Breaks": enter image description here

Moreover, I don't know what is the equivalent in ArcObjects of checking "Draw this layer using the symbol levels specified below".

  • Not sure if this applies but perhaps you could use a template layer and import the symbology that way like in THIS question. – landocalrissian Dec 15 '14 at 17:10
  • It doesn't work as the symbology depends on the feature class data. So I think it needs to be generated for each new data programmatically. – superrache Dec 16 '14 at 17:24

It's maybe too late for an answer, but I think thats what you needed - the


IClassify classifyMethod = new NaturalBreaksClass();
(classBreaksRenderer as IClassBreaksUIProperties).Method = classifyMethod.ClassID;

The checking "Draw this layer using the symbol levels specified below" you can also set with the UIProperties: IClassBreaksUIProperties.ShowClassGaps Property

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