Friday, July 04, 2014

USGS Historical Topo Map Explorer online

The USGS has an Historical Topographic Map Explorer at 

that allows you to view topographical maps at all scales that were ever produced by the agency, going back to the 1880s.   I pulled up an 1887 map of the Prescott area in the screen shot above.   The sliding bar at the bottom of the search box lets you see what scale maps were generated in what year.   Maps are available for the entire country.

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