USGS - science for a changing world

Earth Observing 1 (EO-1)

  • Login

  • Location: Products » Image Previews

    Image Previews

    All EO-1 data product images should be previewed prior to download to examine the level of cloud cover and the extent of the coverage area. Browse images of all available scenes may be viewed by searching Earth Explorer or GloVis.

    Each Advanced Land Imager (ALI) browse image is generated from Level 1 data and is displayed as an 4,3,1 (RGB) band combination, where each band is linearly stretched between the 1% and 97% histogram values. The data are also reduced by a factor of 8 in each direction and the jpeg image is compressed to a 75% quality.

    Each Hyperion browse image is created from the Level 0 (raw) data and is displayed as an RGB (40:31:13) band combination. Hyperion browse images have had the dark calibration subtracted and the gains have been applied. Each band is linearly stretched between the 1% and 97% histogram values. The data are also scaled from 12 bits to 8 bits. Finally, the data are reduced by a factor of 4 in each direction and jpeg compressed to a 75% quality.

    **A few single band browse images for Hyperion were created from the Level 0 (raw) data. These browse images may contain vertical lines and have zero data values from sensor artifacts. Note: Level 1 processing corrects this anomaly. Hyperion browse images are the monochromatic from VNIR band 40. Each band is linearly stretched between the 1% and 97% histogram values. The data is also reduced by a factor of 4 in each direction and jpeg compressed to a 75% quality.

    Accessibility FOIA Privacy Policies and Notices Google Maps API Disclaimer

    USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
    URL: http://eo1.usgs.gov
    Page Contact Information: custserv@usgs.gov
    Page Last Modified: December 13, 2011