RAMAS GIS is designed to link your GIS with a metapopulation model for population viability analysis (PVA) and extinction risk assessment. Habitats used by most species are becoming increasingly fragmented, requiring a metapopulation modeling approach to risk analysis. Recognizing habitat patchiness from an endangered species' point of view requires spatial information on habitat suitability. RAMAS GIS meets both of these requirements by linking metapopulation modeling with landscape data and GIS technology.