I want to group symbols together in QGIS when they are displayed to close together and thus clutter a map. As the user zooms in these should then be separated. The result should be exportable to SLD for use in Geoserver.
For example we have implemented this on a Mapserver install but I was wondering if the same is possible in QGIS and SLD for Geoserver (see geoserver PointStacker for a similar question)
Nathan W pointed me to a few resources to write a script to do this. http://www.qgis.org/pyqgis-cookbook/vector.html#creating-custom-symbol-layer-types I can't figure out where to create this or how to test it? Any advice?