Abstract
The Spanish Ministry of Defense possesses more than 37,000ha located within the Natura 2000 network. Defense activities require wide natural spaces that, over time, have become landscapes which are natural reserves of biodiversity. Therefore, an analysis of these areas in order to carry out environmental managements is advisable. Spatial visualization tools such as Geographic Information Systems (GIS) clearly make this task easier. However, it is also necessary to take into account the criteria which influence the decision problem. For these reasons, the combination of a GIS tool with two Multi-Criteria Decision Making (MCDM) methods, Analytic Hierarchy Process (AHP) and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS), is proposed. The AHP methodology is applied to obtain the weight of the criteria while the TOPSIS method provides a ranking of alternatives. Natural spaces located in south-eastern Spain, constitute the study area. The results highlight that the most vulnerable area that should have a priority treatment corresponds to Mar Menor area.
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