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.

Superstorm Sandy Impacts

View areas impacted by Superstorm Sandy and associated demographic information. More Story Maps