Airphotos frequently show light tones on high points of morainal systems but darker tones in depressions which are primarily caused by different soil moisture contents. Experiments were conducted on the ground with glacial soils at different water contents. The relationship between the tone of airpohotos and the water content of soils was established with the following commercial aerial films: Super XX-Aerographic, Infrared-Aerographic, Aero-Ektachrome, Aero-Ektachrome Camouflage Detection (Infrared color). The densities of the developed films were measured on the negatives with a standard Weston Photographic Analyzer (densitometer). Results obtained from ground experiments did not match the density-moisture proportions from actual airphotos which were believed to exist. The film densities rose approximately proportional to the moisture contents up to near the Atterberg Plastic Limit of the soil, but sharply decreased again towards the Atterberg Liquid Limit. Darker tones through concentration of organic matter in terrain depressions and rapid drying of wet soil in thin sheets on the surface in contrast to darker wet soil below do not permit the calculation of moisture contents from presently available photographic emulsions. /Author/

  • Corporate Authors:

    University of Michigan, Ann Arbor

    Institute of Science and Technology
    Ann Arbor, MI  United States  48109
  • Authors:
    • Winkler, E M
  • Publication Date: 1963-2

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Filing Info

  • Accession Number: 00263299
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 19 1974 12:00AM