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To commemorate the 100th anniversary of the opening of the Panama-Pacific International Exposition in San Francisco, February 20th's Maps and More featured maps related to the exposition and the opening of the Panama Canal. Learn about more events related to the centennial of the exposition at http://www.ppie100.org/.
The USGS issued new printings of topographic maps and produced a series of geologic guidebooks of the western United States for the use of visitors to the exposition. See USGS circular 1343 (p. 74) for more details.
The USGS updated the topographic map covering San Francisco and the Exposition City in 1915. Explore the differences between the 1915 edition and earlier ones. These are also available in print at the library: G3700 svar .U6 CA San Francisco (Case D)
The four guides can be found in the library at QE.75 A4 set 2 nos. 611-614 or online through the USGS website:
In the year leading up to the Exposition, the Department of the Interior produced a colorful relief map depicting a, "Panoramic View of the Yosemite National Park, California." G4362.Y6 1914 .R4 (Case D)