Module @luciad/ria/view/feature/transformation/ClusteringTransformer

Create a ClusteringTransformer with default settings

const defaultTransformer = create();

Copy

Create a ClusteringTransformer with non-default settings

const transformer = create({
  defaultParameters: {
    clusterSize: 100,
    minimumPoints: 5
  }
});


Copy

Create a transformer with specific parameters for a particular classification and defaults for all other classifications

class UnitsClassifier extends Classifier{
  getClassification(object: Feature): string {
    if (isAirUnit(object)) {
      return "air";
    } else if (isGroundUnit(object)) {
      return "ground";
    } else {
      return "sea";
    }
  }
}

const unitsClassifier = new UnitsClassifier();
const airTransformer = create({
  classifier: unitsClassifier,
  //specify the settings for the air class
  classParameters: [
    {
      classification: "air",
      parameters: {
        clusterSize: 100,
        minimumPoints: 5
      }
    }
  ]
  //all other classes will use the default settings
});

Copy

Create a transformer with specific parameters for a particular classification and other specific parameters for all other classifications

unitsClassifier.getClassification = function(object): string {
  return object.id as string;
};
const bigTransformer = create({
  classifier: unitsClassifier,
  //these settings will be applied to all units
  defaultParameters: {
    clusterSize: 100,
    minimumPoints: 2
  },
  // Except for air units, which override some of the settings
  // note that the settings which are not overridden (e.g. clusterSize)
  // will be taken from the "defaultParameters" settings
  // So in this example, for this air class the clusterSize will be 100 as well
  classParameters: [{
    classMatcher: (classification): boolean => classification.toLowerCase() === "air",
    parameters: {minimumPoints: 5}
  }]
});

Copy

Create a transformer with specific configurations for different scale levels, reusing the unitsClassifier defined above.

const zoomedOutTransformer = create(); //default configurations applied
const zoomedInTransformer = create({
  classifier: unitsClassifier,
  classParameters: [
    {
      classification: "air",
      parameters: {
        clusterSize: 50,
        minimumPoints: 5
      }
    }
  ]
});
const scaleDependentTransformer = createScaleDependent({
  levelScales: [1 / 100000],
  clusteringTransformers: [zoomedOutTransformer, zoomedInTransformer]
});

Copy

Using the ClusteringTransformer in combination with a FeatureLayer

const model = new KMLModel("");

const clusteringTransformerSnippets = create();
const layer = new FeatureLayer(model, {
  transformer: clusteringTransformerSnippets
});


Copy