The use of low sun-angle photography for the enhancement of topographic features has been known for many years. The analyses of low sun-angle photography in separate test sites in a mid-latitude region are used to describe interpretation techniques and to compare the effectiveness of different scales of low sun-angle photography. The critical question of when to fly a low sun-angle photographic mission based on the terrain, trends of topographic features, and the effects of sun azimuth and altitude (angle) are considered. It appears that strict adherence to the extended formula need not be applied as shown by enhancement of subtle topographic features.

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  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  United States  22046
  • Authors:
    • Walker, P M
    • Trexler, D T
  • Publication Date: 1977-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00164066
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 9 1977 12:00AM