Geographic information systems (GIS) are powerful tools that display spatial information (such as locations on a map) in order to help us understand patterns and relationships about our world.

So, with National GIS Day on November 16th, the WatchBlog is looking at how this technology helps us communicate clearly and answer complex questions about loan programs, Amtrak service, and more.

Read more here about how the GAO is using GIS to analyze geographic data in meaningful ways.