National Atlas Map Maker - Map layers

http://nationalatlas.gov/maplayers.html

Links to hundreds of map layers of geospatial information listed by subjects for use with the National Atlas Map Maker to assemble, view, and print customized maps using one or more of the layers.

Related topics:
Cartography, Geospatial datasets, Land use and land cover, Map interfaces, Maps and atlases
Alternative formats of this information:
Compatible standard Format
FGDC-CSDGM Text XML JSON
CCM of Project Open Data JSON
ISO 19115 XML