Create Clusters

It is possible to generate clusters on point layers to improve performance. Clusters are also used to facilitate the interpretation of very dense layers. Points that are located near each other are replaced by a single circle. The number shown on each circle corresponds to the number of points clustered. The size of each cluster is adjusted dynamically to bring out the most important clusters.

Layer Without Data Clusters	Layer With Data Clusters

When a thematic analysis by color categories or ranges is added to this point layer, the clusters are displayed as pie charts. The data tip of a cluster can include the following information:

• Total count of points clustered.
• Sum, average, minimum or maximum value of a numeric thematic data.
• List of the number of points belonging to each color category or range.

To generate clusters on the CartoVista Server, click on the clustering button on the right of the layer's record and click Yes in the confirmation window. Generating the clusters can take several minutes to more than an hour to complete, depending on the number of records the layer contains.