LOW SUN-ANGLE PHOTOGRAPHY
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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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00991112
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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
- Features: Figures; References; Tables;
- Pagination: p. 493-505
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Serial:
- Photogrammetric Engineering and Remote Sensing
- Volume: 43
- Issue Number: 4
- Publisher: American Society for Photogrammetry and Remote Sensing
- ISSN: 0099-1112
Subject/Index Terms
- TRT Terms: Altitude; Azimuth; Photography; Sun; Topography
- Subject Areas: Design; Highways;
Filing Info
- Accession Number: 00164066
- Record Type: Publication
- Files: TRIS
- Created Date: Nov 9 1977 12:00AM