Publication Date:
2019-07-13
Description:
Shadow enhancement of topographic linears in photographic or scanner images is a valuable tool for interpretation of geologic structures. Whether linears will be enhanced or subdued depends on sun angle and azimuth. The relationship of the sun's attitude to topographic slopes determines which trends are available for interpretation in existing imagery, and it can be used to select the time of day, surface properties, and film and filter characteristics in planning aircraft flights or satellite orbital passes. The technique of selective shadow enhancement can be applied to all photographic or imaging experiments, but is best for snow-covered scenes, side-looking radar images, and painted relief models.
Keywords:
EARTH RESOURCES AND REMOTE SENSING
Type:
Remote sensing of earth resources. Volume 3 - Third Conference on Earth Resources Observation and Information Analysis System; Mar 25, 1974 - Mar 27, 1974; Tullahoma, TN
Format:
text
