Usgs Historical Topographic Map Explorer

Usgs Historical Topographic Map Explorer. In 2011, the USGS National Geospatial Program began publishing scans of 1:250,000. Animation Speed -+ Are you sure you want to unpin all your topo maps?


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These maps are modeled on the familiar 7.5-minute quadrangle maps of the period 1947-1992, but are mass-produced from national GIS databases on a repeating cycle The Historical Topographic Map Collection, or HTMC, provides a comprehensive digital repository of all scales and all editions of U.S

Geological Survey (USGS) from the inception of the topographic mapping program in 1884 until the last paper topographic map using lithographic printing technology was published in 2006. The Historical Topographic Map Collection (HTMC) is the set of scanned images of USGS topographic quadrangle maps originally published as paper documents in the period 1884-2006 The Historical Topo Map Explorer provides a visual way to search and explore these thousands of maps via geographic extent, publication year, and map scale.

. Geological Survey (USGS) from the inception of the topographic mapping program in 1884 until the last paper topographic map using lithographic printing technology was published in 2006. In 2011, the USGS National Geospatial Program began publishing scans of 1:250,000.

. Geological Survey (USGS) printed topographic maps that is easily discovered, browsed, and downloaded by the public at no cost. The recently updated Historical Topo Map Explorer app helps you visually explore and access over 181,000 historical scanned USGS topo maps, and you can add terrain, satellite imagery, and labels to the display