What is GIS?

A geographic information system (GIS) lets us visualize, question, analyze, interpret, and understand data to reveal relationships, patterns, and trends. Learn more.

Getting Started

• Top Five Benefits of GIS
• What Can I Do with GIS?
• The Geographic Approach
• Glossaries & Publications

Try GIS

Virtual Globe

Use ArcGIS Explorer (free) to combine your spatial data with free map services.

Make a Nuclear Proximity Map

Map how close you are to a U.S. nuclear power plant. More Maps