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USGS - science for a changing world

Global Land 1-KM AVHRR Project

Global Composite Corner Points

Please note that while your coordinate input is used to extract your area of interest, the extraction software works with "tiles" of data that are 128 by 128 pixels. As a result the corner latitude and longitude coordinates of your area of interest will be offset slightly different than specified and will always be slightly larger.

If you do not intend to reproject the data to another projection or overlay any other data that was not retrieved using this method there will not be any real problems. If you use the same coordinates to retrieve several different composite periods or bands, the data will be extracted identically and the geometry will be consistent.

The actual corner point coordinates will be displayed on the verification screen.


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URL: http://edc2.usgs.gov/1KM/corners.php
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Page Last Modified: June 23, 2008