Polygon Layers
107th Congressional Districts
County Boundaries
Federally Adjusted Urbanized Areas
Military Base Boundaries
National Parks
State Boundaries
Point Layers
Airports
Amtrak Stations
National Highway Planning Network Nodes
Place Names
Intermodal Terminals
Railway Nodes (1:100,000 base scale)
Railway Nodes (1:2,000,000 base scale)
U.S. Army Corps of Engineers Ports*
U.S. Corps of Engineers Navigable Waterway Nodes
PolyLine Layers
Railway Network (1:2,000,000 base scale)
Runways Associated with Public Use Airports
Fixed Guideway Transit Network