The United States Geological
Survey, in cooperation with individual states, surveyed a large
portion of the United States in the early part of the 20th Century.
From these surveys, a set of 15 minute topographic quadrangles were
published (and reprinted but in most cases not updated.)
The maps are available in various conditions at some large public
and university libraries that are federal repositories. Because these
maps are now hard to find, volunteers have begun scanning them and making
them available on the web.
The USGS is quite far along on scanning their collection of historic topographic maps...
USGS now has most historic topos available for free download
NETROnline's HistoricAerials.com site has loaded these topos onto their site, georeferenced with their historic aerials.
Texas A&M University has 227 folios available for download as pdf, jpg or tiff files.
MapTech (now MyTopo) hosts 15' historic topos at historical.mytopo.com as 200dpi jpegs. This volunteer project has completed the Northeastern
United States (including Ohio primarly scan by myself). It includes topos not yet included in the USGS Historic Topo scanning project.
This project was originally hosted on the University of
New Hampshire Diamond Library web site at docs.unh.edu/nhtopos/nhtopos.htm. New England and New York maps are
still available there in jpeg format.
Northeast Ohio maps are on this web site in DjVu format
at railsandtrails.com/usgs1900/oh/. The 1950's era 7.5 minute topos are also available.
The University of Alabama has a large collection of historic topo maps online at alabamamaps.ua.edu/historicalmaps. The topo map link is at the top of the "Individual States" index page. Ohio Pennsylvania. They have many other maps types as well.
48 large scale topographic maps of Cincinnati
in 1912 are available from the Office
of Coast Survey, National Oceanic and Atmospheric Administration Historic
Maps and Navigation Charts Site. Search the image catalog for Cincinnati.
David Rumsey's online historic
map collection includes a few topographic maps at www.davidrumsey.com
The Perry-Castañeda Library
maintains a list of Historic Map web sites at www.lib.utexas.edu/maps/map_sites/hist_sites.html
online maps of some U.S. Cities at www.lib.utexas.edu/maps/historic_us_cities.html
California maps (San Francisco
Area) are on the UC Berkeley Library web site at sunsite.berkeley.edu/histopo/
A list of California maps (none online) is at www.lapl.org/guides/ca-topos.html
Nevada and selected maps from surrounding states at keck.library.unr.edu/data/historic_topos/detail_list.htm
Sample topographic maps of Buffalo, NY at ublib.buffalo.edu/libraries/units/sel/collections/maps/maps/histmapbuff.html
The 1933 Report on the Ohio Topographic Survey included
information on how the survey was completed. A scan of this section
is available in DjVu format.
GeoPDF PA 15': Allentown 1894 1939 1957 West 1902 1942 1957
page updated 08/11/12