The topoView application provides a visual overview of the HTMC and serves maps in additional formats. The National Map Download Client is the primary portal for finding and downloading maps and other data products of the USGS National Geospatial Program. Today, the HTMC contains over 185,000 high-resolution, georeferenced digital files, with accompanying metadata, representing these legacy maps. Many of these maps are no longer available for distribution in print. In 2011, the USGS National Geospatial Program began publishing scans of 1:250,000-scale and larger topographic maps printed between 1884, the inception of the topographic mapping program, and 2006, when the final maps created using traditional cartographic methods and lithographic printing processes were published. Geological Survey (USGS) printed topographic maps that is easily discovered, browsed, and downloaded by the public at no cost. The Historical Topographic Map Collection, or HTMC, provides a comprehensive digital repository of all scales and all editions of U.S.
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