County boundaries 2001: map layer description file
One of many map layers of the National Atlas giving county boundaries with metadata. The county boundaries map layer can be downloaded in Shapefile or SDTS formats.
(Score: 0.690)
Digital Line Graphs (DLGs)
Description of Digital Line Graphs (DLG)with explanations of layers and feature types, scales, available products, media, prices, and links to search and order webpages.
(Score: 0.690)
National Map: topographic maps for the 21st century
Description of the National Map project intended to provide a seamless, integrated, and continuously maintained set of geographic base information for easily accessible, up-to-date, accurate mapping of the United States.
(Score: 0.690)