USGS California Historic Topo Maps Online
"More than 13,000 online maps provide historic view of state" by Agustin Armendariz, © California Watch, November 9, 2011. (News Article)
"This week, the U.S. Geological Survey added 13,688 historical California topographic maps to its online archive, hundreds of which date back to the 1800s. ... " [More]
[Courtesy Google Alerts.]
posted from CPRR Discussion Group at 11:09 AM
2 Comments:
Also see Central Pacific Railroad Maps.
Topographic maps are also known as contour maps [such as this Contour Map of the Central Pacific Railroad from Summit Valley to the Truckee River by Samuel Montague and Lewis M. Clement.
From Vose, Manual for Railroad Engineers, 1883].
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