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A system of regional agricultural land use mapping tested against small scale Apollo 9 color infrared photography of the Imperial Valley (California)
Claude W. Johnson, Leonard W. Browden, Robert W. Pease
1969, Open-File Report 71-158
Interpretation results of the small scale ClR photography of the Imperial Valley (California) taken on March 12, 1969 by the Apollo 9 earth orbiting satellite have shown that world wide agricultural land use mapping can be accomplished from satellite ClR imagery if sufficient a priori information is available for the...
Measurement of discharge by the moving-boat method
George F. Smoot, Charles E. Novak
1969, Techniques of Water-Resources Investigations 03-A11
This chapter describes the procedures for measuring discharge in large streams by the moving-boat technique. During the traverse of a boat across a stream, a sonic sounder records the geometry of the cross section, and a continuously operating current meter senses the combined stream and boat velocities. These data are...