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In the 90’s, Geographic Information Systems started having a remarkable demand, since they are an innovative technology that allows visualizing information in a spatial way, along with its geographic distribution. Digital maps enterprises offer a variety of services, among them stand out the ratification of addresses: to check clients’ databases for detection and correction of wrong entries, and then to validate the integrity of every new record that is inserted. This work details the development of an algorithm that improves the process of ratification using spelling techniques, with the goal of minimizing the human intervention required in the process, without sacrificing quality. The benefits are better response times and reduction of service costs.