The National Map also serves as the source of base mapping information for derived cartographic products, including 1:24,000 scale US Topo maps and georeferenced digital files of scanned historic topographic maps.
The majority of The National Map effort is devoted to acquiring and integrating medium-scale (nominally 1:24,000 scale) geospatial data for the eight base layers from a variety of sources and providing access to the resulting seamless coverages of geospatial data. The geographic information available from The National Map includes boundaries, elevation, geographic names, hydrography, land cover, orthoimagery, structures, and transportation. The National Map is easily accessible for display on the Web through such products as topographic maps and services and as downloadable data. Nationally consistent geospatial data from The National Map enable better policy and land management decisions and the effective enforcement of regulatory responsibilities. Customers can use geospatial data and maps to enhance their recreational experience, make life-saving decisions, support scientific missions, and for countless other activities. The National Map supports data download, digital and print versions of topographic maps, geospatial data services, and online viewing. The National Map embodies 11 primary products and services and numerous applications and ancillary services. The National Map is a suite of products and services that provide access to base geospatial information to describe the landscape of the United States and its territories.
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