Scale

USGS does not currently offer vector downloads in bulk other than by special request only.
For more information, please go to the Download and Cart Web page.
US Topo maps and the maps of the Historical Topographic Map Collection (HTMC) can be downloaded free of charge, in PDF format,
Select the Print icon in the upper right-hand corner. You can save and print a map either in PDF, JPEG, or PNG formats. PDF allows the user to include map elements in the header, such as a title and notes.
The Add Data tool in the Advanced toolbar allows you to add an ArcGIS Server (AGS) REST service, Keyhole Markup Language (KML) data file, Really Simple Syndication (RSS), Web Map Service (WMS), or Web Map Tile Service (WMTS) to the map display.  Before
PLSS data is available in the Content sub-tab under Overlays in a panel called Other Featured Data in the table of contents of The National Map viewer.
The National Map Viewer Quick Start User Guide can be found here.
Open Issues or Key Notes with The National Map Viewer(last updated: 2/17/2016)Viewer
Contours are not projected, but are provided in geographic coordinates (latitude and longitude) in units of decimal degrees, and horizontally referenced to the North American Datum of 1983.
There are two shaded relief services: (1) USGSShadedReliefOnly (MapServer), which is a tile cache base map service from world scale to 18K, and (2)