Photo Credits

Historic Photos
  • San Francisco Harbor 1851 - This image is available from the United States Library of Congress's Prints and Photographs division under the digital ID cph.3g07421

  • Physiography from landform map by Erwin Raisz: permission pending - American Geographic Review, 1931
  • Ocean Drainage map : This file has been (or is hereby) released into the public domain by its author, Citynoise at the wikipedia project. 
  • Relief map of California : University of California
  • Map of North America: This is NASA "Blue Marble" image applied as a texture on a sphere using Art of Illusion program.  Public Domain; NASA
Art & Photography
  • Yosemite - John Englehart - Public Domain - Source
  • Hetch Hetchy - John Englehart - Public Domain - Source
  • Miwok Paiute People - Yosemite Valley - Eadweard Muybridge - Photograph - Public Domain
  • Galen Clark - Public Domain - Source
  • John Muir and Theodore Roosevelt - Library of Congress - Public Domain - Source