"US Topo" is the next generation of topographic maps from the U.S. Geological Survey. 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 found in The National Map, 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 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.
For more information please visit www.nationalmap.usgs.gov/ustopo