The study approaches the use of a combined methodology between MCDA (Multicriteria Decision Analysis) and GIS (Geographic Information System) to support decision making in the context of policies in respect of public security. In this sense, the use of DRSA (Dominance-based Rough Set Approach) promotes a sorting structure of evaluated areas to determine applicable actions to minimize criminal occurrences, in the same time GIS was used to spatial visualization for a better interpretation of the results. In addition, an application was done in Recife – Pernambuco.