Drumlin fields and glaciated mountains - A contrast in geomorphic perception from Seasat radar images

• Main Author: Ford, J. P.
• Format: Other/Unknown Material
• Language: unknown
• Published: 1981
• Subjects: 43; alaska range; Alaska
• Online Access: http://ntrs.nasa.gov/search.jsp?R=19830028860

Digitally correlated Seasat synthetic-aperture radar (SAR) images of the Alaska Range, Alaska, and the drumlin-drift belt in Ireland are analyzed for the perception and identification of geomorphic features. The two terrains display strongly contrasted types of glacial topography whose identification in each case is related to the geometry of the Seasat imaging radar. Identification of terrain shape and form is important within the caveats imposed by the intrinsic distortions on the radar images. Image texture serves coarsely to distinguish topography. Image tones are scene-dependent and do not uniquely identify specific targets. Extensive alignments of linear and curvilinear features provide some of the more important image information from which to make geologic interpretations in each case.