Base Map

USGS does not currently offer vector downloads in bulk other than by special request only. For assistance, send an e-mail to tnm_help@usgs.gov, and include your contact information, requested product, requested area, and download format.
Vector data for small scales are from the National Atlas, while medium to large scales are comprised of all of The National Map themes, to include the National Hydrography Dataset (NHD) and Geographic Names Information System (GNIS) data.  Other medium...
Composite base maps have cached tiles to cover the whole world, but only for oceans, continents and countries at smaller scales.  Larger view scales have detailed data for the conterminous U.S., Alaska, Hawaii, Puerto Rico, U.S. Virgin Islands, Territory...
No, but additional features in The National Map are found in dynamic services.  Expand the Overlays pane above the Content sub-tab, expand individual Base Data Layers by clicking on the + signs, and select which additional features you may want to view...
TNM Viewer uses a series of composite base maps to replace older vector maps.  These new base maps combine layers into single cached tile services with the cartographic richness of multiple data sources.  As of 2013, the following composite base maps are...
A tiled service contains cached tiles, which render the map in small tile images. This allows the map to perform much faster when panning and zooming, compared to a dynamic service. Dynamic is considered an "old" way of displaying web maps, where each...
File sizes to store tiles increase 4x with each zoom scale when building a cache for a tiled base map service.  The storage size required to cache data at scales larger than 1:18,000 is greater than USGS can currently store.  For example, just to store...
Yes, visit The National Map-Service Endpoints website.  There is a Google Earth link at the top of each Service URL page, and at the bottom, there are links to both WMS and Generate KML. For more WMS and KML tips on services or future changes, please go...
USGS cartographers first leveraged cartographic decisions made for the USGS 1:24,000/1:25,000-scale series requirements, and for the new US Topo product using diverse landscape sample areas, such as varying densities of features, rural vs. urban, land...
USGS cartographers compared older USGS 1:100,000- and 1:250,000-scale series requirements, and for smaller scales, they compared popular base maps already in use. The goal for cartography was to have a WYSIWYG (what you see is what you get) experience...