The satellite images used in the mosaic were acquired by the Advanced Very High Resolution Radiometer (AVHRR) sensors on the National Oceanic and Atmospheric Administration (NOAA) satellites; the images used in the mosaic were collected during the period 1980 to 1994. Although the AVHRR scans a 2400 km-wide swath and can image nearly half of the continent of Antarctica on a single orbit, 63 sections of 38 scenes were needed to compile the nearly cloud-free digital mosaic.
The digital image mosaic used as input was previously mosaicked, controlled, and geometrically corrected into a Polar Stereographic projection by the National Remote Sensing Center, United Kingdom. Details of the processing they used to generate the original mosaic can be found in the International Journal of Remote Sensing (1989, v. 10, nos. 4 and 5, p. 669-674). The USGS evaluated the geometric accuracy of the mosaic and estimated a root-mean-square error of 2.5 km. The digital image processing that created this modified image base was done at the USGS Flagstaff Field Center, Flagstaff, Arizona. Replacement images were geometrically corrected to the first image base, digitally inserted into the mosaic, and radiometrically/tone matched to blend with the surrounding images. When the entire mosaic was completed band 1 (visible, 0.58-0.68 micrometers) and band 2 (near-infrared, 0.725-1.100 micrometers) were averaged, and the entire digital mosaic was enhanced using a 91 by 91 pixel spatial filter; these results were then contrast stretched.
The published hardcopy version, USGS map I-2560 authored by:
Jane G. Ferrigno, Jerry L. Mullins, JoAnne Stapleton, is for sale by the U.S. Geological Survey Information Services, Box 25286, Federal Center, Denver, CO 80225.Pat S. Chavez, Jr., Miguel G. Velasco, Richard S. Williams, Jr., George F. Delinski, Jr., and D'Ann Lear Download map ordering information from the USGS National Mapping Center: | Photograph of the hardcopy map |
Page 2: Antarctica DEM, Shaded Relief, and Stereoscopic AVHRR |
Project Team: |
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Pat S. Chavez, Jr. | Remote Sensing Scientist/ Team Leader |
Jane G. Ferrigno | Geologist (Remote Sensing) |
Miguel G. Velasco | Lead Image Processor on this project |
Jo-Ann Bowell | Image Processor |
Stuart C. Sides | Computer Scientist |
Cheryl Hallam | Geographer (GIS) |
Rosendo R. Gonzalez | Programmer |
Deborah L. Soltesz | Web Page Design |
For more information about this project, contact:
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Pat S. Chavez, Jr.
Email: pchavez@usgs.gov
U.S. Geological Survey 2255 N. Gemini Dr. Flagstaff, AZ 86001 Tel: (520) 556-7221 FAX: (520) 556-7169 |
Jane G. Ferrigno
Email: jferrign@usgs.gov
U.S. Geological Survey 955 National Center Reston, VA 20192 Tel: 703-648-6360 FAX: 703-648-6524 |
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