Enter FTP Site About the Data US Topo is the next generation of digital topographic maps from the U.S. Geological Survey. Arranged in the traditional 7.5-minute quadrangle format, digital US Topo maps are designed to look and feel like the traditional paper topographic maps for which the USGS is so well known. At the same time, US Topo maps provide modern technical advantages that support wider and faster public distribution and enable basic, on-screen geographic analysis for all users. Each US Topo map quadrangle is constructed in GeoPDF® format from key layers of geographic data found in The National Map: orthoimagery roads geographic names contours hydrographic features These data were collected from local, State, Federal, and other sources.

Determining the File Name Use the USGS Quad Name Index to find the 250K quad sheet name. Sample file name: FL_Hialeah_SW_20090929_OM_geo.pdf FL = Florida Hialeah = the quad name 20090929 = creation date Note that some files in the Florida panhandle may appear in the Alabama folder. Special Software Needed GeoPDF© is a published extension (OGC 08-139r1) to the Adobe PDF file format, from TerraGo Technologies. It is used to present GIS and mapping data in a standard Adobe Systems PDF. These files can be used in ArcMap. Download your free viewer from TerraGo Technologies.

For More Information
For more information on the US Topo, view the
brochure or visit the website.