The National Map
Next Generation of Topographic Maps
US Topo is the next generation of topographic maps from the USGS. Digital US Topo maps are designed to look, feel, and perform like the traditional paper topographic maps for which the USGS is so well known. However, in contrast to paper-based maps, US Topo maps provide technical advantages that support faster, wider public distribution and enable basic, on-screen geographic analysis for all users.
Arranged in the familiar 7.5-minute quadrangle format, US Topo maps are available free on the Web. Each map quadrangle is constructed in GeoPDF® format from key layers of geographic data – orthoimagery, roads, geographic names, topographic contours, and hydrographic features – found in The National Map, which is a nationwide collection of integrated data from local, State, Federal, and other sources.
US Topo users can turn geographic data layers on and off as needed, zoom in and out to highlight specific features or see a broader context, and print the maps — in their entirety or in customized sections — on a wide variety of printing devices. File size for each digital US Topo 7.5-minute quadrangle, about 15–20 megabytes, is convenient for most computer users. Electronic analytical tools are also available for free download.What Makes the USGS US Topo Different from Other Electronic Maps?
The prototype of US Topo, "Digital Map–Beta", has been available since June 2009. A US Topo map includes all of the content of the earlier "Digital Map–Beta" plus integrated contours and hydrographic features. As the US Topo product evolves, the USGS will provide digital, historical versions of USGS topographic map quadrangles and will incorporate additional geographic data layers from The National Map.