Would it be possible to allow users to define sub-groups for countries, to have a finer granulation or to tell certain regions apart? What I have in mind, for example, is to take the total find count for Italy and then define two subsets 'Italian islands' and 'Italian mainland' - the latter one would be empty for me, in this case. It would be ok to do the split manually but of course, if data allows, one could also think about a filter criterion (per county, per height, per latitude,...) Would this be reasonable?