Display clusters with a Symbol Layer

This sample shows how to enable point based clustering on a data source and render them with different symbols. Clustered points have four properties;

• cluster - A boolean value indicating that it is a cluster.
• cluster_id - A unique id for the cluster which can be used with the DataSource getClusterExpansionZoom, getClusterChildren, and getClusterLeaves functions.
• point_count - The number of points the cluster contains.
• point_count_abbreviated - A string that abbreviates the point_count value if it is long. (i.e. 4,000 becomes 4K)