the full range of techniques and applications has been recently discussed in an interesting survey developed by Malczewski (2006a). From 2000 the number of studies has been increasing and several applications can be found in different fields. A detailed analysis of the state of the art of these tools is beyond the scope of the present paper; the interested reader is referred to Ferretti (2012) for a classification of the scientific international literature highlighting the most recent global trends of the research in the MC-SDSS field.