Excerpts: The aerial photographs in this bulletin were selected to show characteristics and use of land in three areas in California, Oregon, Washington, and Idaho. Accompanying the photographs of each area is a brief description of land use, climate, soils, and topography for the area which the photos illustrate. Aerial photographs, used with maps and descriptions, provide a comprehensive idea of how land is used. Such richly detailed photos can be viewed stereoscopically for three-dimensional study of relationships between items on the earth's surface and man's activities.