By Alice Lipowicz. Federal Computer Week, September 13, 2011. "The U.S. Geological Survey (USGS) is nearly halfway through its release of more than 250,000 historical topographic maps in high-resolution electronic format, some of which are more than 100 years old..."
Further information on USGS puts historical maps online
Last updated: 15 September 2011Enter your email address to subscribe or unsubscribe from the eGov What's New mailing list.
Please enter email address of the person you wish to send this page to.