• The National Map:  http://nationalmap.usgs.gov/nmjump.html
    The National Map Viewer provides access to national data from the United States Geological Survey (USGS) and its partners. Visitors have access to numerous tools for viewing and creating maps.

  • The USGS Seamless Data Distribution System:  http://seamless.usgs.gov/
    The USGS Seamless Data Distribution System allows users to browse and download USGS national datasets for user selected areas of interest. In addition, http://gisdata.usgs.gov/website/kentucky/   is a state specific USGS site that works the same as the seamless data server. Visitors can use this site to download national data by first zooming out and then zooming to their area of interest.

  • The National Atlas of the United States®:  http://www.nationalatlas.gov/
    The National Atlas strives to promote national geographic awareness. It provides easy-to-use, customizable map views of America's natural and sociocultural landscapes, and allows users to download map layers from created maps.

  • TerraServer:  http://terraserver.microsoft.com/
    The Microsoft TerraServer provides access to over 3 tera-bytes of high resolution USGS aerial imagery and topographic maps.

  • State GIS:  http://chppm-www.apgea.army.mil/gwswp/GWLinks/stategis.htm
    The State GIS provides downloadable access to various geospatial data on a state-by-state basis.