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Stereocorrelation of Landsat TM imagesA digital elevation model (DEM) developed from Landsat TM images of a rugged terrain area in north Georgia by automated stereocorrelation techniques yielded an rms error (z), RMSE(z), value of + or - 42 m. Based on the B/H ratio of 0.18 for the Landsat data, this Z-error corresponds to a planimetric correlation accuracy of about + or - 0.3 pixels, confirming that precise correlation can be achieved with operational satellite data. Contours at a 100-m interval interpolated from the DEM show a deviation of + or - 33 m from reference contours obtained from existing 1:24,000-scale maps. The 28.5-m pixel resolution and the weak B/H ratio impose limitations on the accuracy that can be achieved with Landsat TM data. However, it is anticipated that RMSE(z) values of + or - 10 m or less can be achieved with SPOT-1 panchromatic stereo images of 10-m resolution recorded at B/H ratios of 0.5 to 1.0. DEMs generated by stereocorrelation techniques can be used to create orthoimages, perspective views, and topographic map products.
Document ID
19880025105
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ehlers, Manfred
(Georgia Univ. Athens, GA, United States)
Welch, R.
(Georgia, University Athens, United States)
Date Acquired
August 13, 2013
Publication Date
September 1, 1987
Publication Information
Publication: Photogrammetric Engineering and Remote Sensing
Volume: 53
ISSN: 0099-1112
Subject Category
Earth Resources And Remote Sensing
Accession Number
88A12332
Funding Number(s)
CONTRACT_GRANT: NAS5-27383
CONTRACT_GRANT: DFG-EH-85/1-1
Distribution Limits
Public
Copyright
Other

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