----------------------------Original message---------------------------- We have a patron trying to locate the criteria by which municipalities are grouped into "homogeneous micro-regions (micro-regioes homogeneas) for the state of Bahia, Brazil (especially these three micro-regions: Chapada Diamantina Setentrional; Chapada Diamantina Meridional; and Piemonte Da Diamantina). Or, as he puts it: In other words, why are certain municipalities put into micro-regions while others aren't? Thanks for any help/clues you can provide. Denise [log in to unmask]