Cluster Group - When many pins are displayed in close proximity to each other it is possible for the map to cluster the pins together with a circle icon and a number representing the number of pins located under it. The
cluster group selected will determine the color of the circle based on the number of pins contained in the cluster. If no cluster group is selected for a pin configuration then the pins returned by the query will not be clustered. If the same cluster group is selected for more than one pin configuration then when clustering occurs it will combine the pins from all the queries.