Usgs Historical Topographic Map Explorer. More about the USGS Historical Topographic Map Collection In 2011, the USGS National Geospatial Program began publishing scans of 1:250,000.
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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 These topo maps are available as a digital library spanning 125 years
Using the Historical Topo Map Explorer app, you can search for maps by address or place or interactively from the map The US Topo series is a latest generation of topographic maps modeled on the USGS historical 7.5-minute series (created from 1947-1992) The Historical Topographic Map Collection (HTMC) is a digital archive of about 190,000 printed topographic quadrangle maps published by the U.S
. 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) printed topographic maps that is easily discovered, browsed, and downloaded by the public at no cost.
Usgs Maps. The Historical Topographic Map Collection (HTMC) is a digital archive of about 190,000 printed topographic quadrangle maps published by the 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.