Error detection and rectification in digital terrain modelsDigital terrain models produced by computer correlation of stereo images are likely to contain occasional gross errors in terrain elevation. These errors typically result from having mismatched sub-areas of the two images, a problem which can occur for a variety of image- and terrain-related reasons. Such elevation errors produce undesirable effects when the models are further processed, and should be detected and corrected as early in the processing as possible. Algorithms have been developed to detect and correct errors in digital terrain models. These algorithms focus on the use of constraints on both the allowable slope and the allowable change in slope in local areas around each point. Relaxation-like techniques are employed in the iteration of the detection and correction phases to obtain best results.
Document ID
19800043262
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hannah, M. J. (NASA Ames Research Center Institute for Advanced Computation, Moffett Field, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: Fall Technical Meeting
Location: Sioux Falls, SD
Start Date: September 17, 1979
End Date: September 21, 1979
Sponsors: American Society of Photogrammetry and American Congress on Surveying and Mapping,