default
          If the data is a collection of point features, setting this to true clusters the points by radius into groups. Cluster groups become new Point features in the source with additional properties:
- clusterIs- trueif the point is a cluster
- cluster_idA unqiue id for the cluster to be used in conjunction with the cluster inspection methods
- point_countNumber of original points grouped into this cluster
- point_count_abbreviatedAn abbreviated point count