NGP Standards and Specifications
Topographic maps are general-use maps at medium scales that present elevation (contour lines), hydrography, geographic place names, and a variety of cultural features.
USGS standard documents define USGS topographic maps.
USGS specification documents define the detailed requirements for producing USGS topographic maps.
US Topo: Maps for America
The USGS digital topographic map series, named “US Topo”.Get Documents
Historical Topographic Map Collection
Digital archive of about 190,000 printed topographic quadrangle maps published by the USGS from the inception of the topographic mapping program in 1884 until 2006.Get Documents