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Are all USGS historical topographic maps scanned and available for download?

As of late 2014, more than 95% of the historical USGS topographic maps - almost 179,000 map sheets - have been scanned and published. An estimated additional 4% are in process and are expected to be published in 2015 and 2016. Additional maps almost certainly remain to be found, and it will be difficult to say when the set of scanned maps is absolutely complete.
 
The Historical Topographic Map Collection project is scanning only standard topographic quadrangle maps with scales 1:250,000 and larger, which is a subset of the total domain of USGS maps.

 

 

Tags: Maps, Topographic, Recreation, Quadrangle, GeoPDF, Scale