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Geographic Information Systems (GIS) is a computerized technology for capturing, storing, updating, manipulating, analyzing, and displaying spatial data. GIS is an analytical tool that helps researchers to display spatial relationships between map features. It helps to answer basic questions such as: "Where is it?", "What has changed since?",  "What spatial patterns exist?", and "What if?". Because of its great analytical component, GIS is used in many disciplines including agriculture, environmental research, geology, archeology, forestry and natural resource management.

 ESRI-USC uses ArcView^®, Arc/Info^®, MapObjects^®, ArcIMS^®, and MOIMS^® for modeling and analysis, for development of GIS databases and development of Web-based GIS applications in its environmental projects.