Getting into touch with human settlements, economic values work as continuous quantitative external factors. However, the geographical localization of those values make evident a discontinuous and qualitative categorization. According to a statement of the Catastrophe Theory, a continuous factor cannot directly explain a discontinuous categorization. In fact, such a categorization is generated by a dynamical agent of its own, which is dependent of a political control upon the places held by the social actors. Moreover, these places are invested by an anthropological meaning when they are appropriated. So the geographical economic features are generated by political appropriations that give out differentiated places invested by an anthropological meaning. Economic values make evident this categorization but do not explain its particular characters.