This directory contains archives of the resulting georeferenced AVHRR band 1 and 2
mosaics, and GTOPO30 digital elevation model.  It was necessary to use a simple
scaling and translation of the global GTOPO30 data to georeference the AVHRR data.
Archive ant-dem16b-regsub.gz contains this slightly modified version of the DEM
data in raw image (raster) format.

The following projection parameters were used:

   Projection: Polar Stereographic
   Ellipsoid: WGS84
   Pixel Resolution: 1.01 KM
   Center Longitude: 0
   Center Latitude: 71 South

   Upper Left X,Y: -2877974.62258588,  2413783.16981739
   Lower Right X,Y:  2919369.49967643, -2535021.30046716

   Number of Lines: 4900
   Number of Samples: 5740


X & Y coordinates in meters (measured from pole)
note: latitude of true scale = center latitude

ARCHIVES
--------
Archives listed contain the following files:

     16-bit Rasterized DEM from GTOPO30 Data
     (in order of least significant byte first, or "PC byte order")
     ant-dem16b-regsub.tar.gz
        ant-dem16b-regsub.hst
        ant-dem16b-regsub.img
        ant-dem16b-regsub.lbl
        readme.txt
        
     http://TerraWeb.wr.usgs.gov/projects/Antarctica/dist/ant-dem16b-regsub.tar.gz


     8-bit AVHRR Mosaic, Band 1
     ant_band1_sub.tar.gz
        ant_band1_sub.hst
        ant_band1_sub.img
        ant_band1_sub.lbl
        readme.txt

     http://TerraWeb.wr.usgs.gov/projects/Antarctica/dist/ant_band1_sub.tar.gz
        
        
     8-bit AVHRR Mosaic, Band 2
     ant_band2_sub.tar.gz
        ant_band2_sub.hst
        ant_band2_sub.img
        ant_band2_sub.lbl
        readme.txt
        
     http://TerraWeb.wr.usgs.gov/projects/Antarctica/dist/ant_band2_sub.tar.gz


OTHER INFORMATION
-----------------

     Image Coverage Diagram: shows for each segment of the mosaic the acquisition date,
     time, and satellite:

     http://TerraWeb.wr.usgs.gov/projects/Antarctica/dist/imagecoveragediagram.gif



FORMAL METADATA
---------------
Formal metadata for this distribution is in progress.
Contact D.L. Soltesz for more information,
webmistress@TerraWeb.wr.usgs.gov

created: 23 december 1998
history: 17 march 1999
          - fixed typo: center latitude and center longitude swapped
         10 april 2001
          - added URL to Image Coverage Diagram

authors: M.G. Velasco mvelasco@TerraWeb.wr.usgs.gov
         D.L. Soltesz webmistress@TerraWeb.wr.usgs.gov
URL, data, history, and info: http://TerraWeb.wr.usgs.gov/projects/Antarctica/AVHRR.html