Cameras equipped with the most recently developed lenses from Wild Heerbrugg Ltd. were used to take aerial photographs from small jet aircraft over the test range at Casa Grande, Arizona. Aircraft, flying height, field angle, and photographic emulsion were varied in the tests. Numerous stereopairs were evaluated in a precision plotter and under a P.I. microscope. The height accuracy obtained from 15 cm (") focal length lenses was 0.004 percent of the flying height or one part in 25,000, which is a new achievement in analog photogrammetry. Systematic effects varying with altitude were detected, and a method for compensation was developed. Ground resolution was better than 2.5 m on the ground for the maximum flying height of 13.4 km (44,000 ft.). The enormous area coverage, combined with high geometric accuracy and ground resolution of high altitude photography, permit the use of new procedures in aerotriangulation, and in small-scale line and ortho-photo mapping. Some proposals for new procedures in these fields of application are made. Other aspects of high-altitude photography, such as automatic navigation, semi-automatic operation of a dual camera system, camera performance, and installation requirements, are discussed as well. The four photographic airplanes tested are now in use in South America. /Author/

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  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  United States  22046
  • Authors:
    • Gut, D
    • Hohle, J
  • Publication Date: 1977-10

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Filing Info

  • Accession Number: 00167902
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM