Decision support processes are used to identify and protect critical ecological resources. This book introduces index-based geospatial decision models used in natural resource management. It covers widely used models, as well as models based on unique principles and techniques. It provides an overview of up-to-date remote sensing, GIS, and landscape ecology techniques. It also discusses satellite image classification to extract model variable values, GIS customization to implement decision models, and landscape metrics calculations for decision model input.