@FaridCher I want to use Heron Mapping Client, GeoServer Apache Tomcat and PostGIS to create an application. I have already copied the source code from the Heron examples and made necessary changes but now I'm facing a challenge of getting 'getFeatureInformation' to work properly. My thinking says I need somebody to help me step by step to configure the servers and get this button to work.

Does anyone know what would be a good (key) reference to cite interval classification with the kmeans technique (in ArcGIS for Desktop, the kmeans is available through the Natural Breaks (Jenks) option)? I'm looking for a reference from scientific journals. Thanks guys.