                  USGS NATIONAL LAND ARCHIVE PRODUCTION SYSTEM 
                        PRODUCT README: GeoTIFF FORMAT

TABLE OF CONTENTS

INTRODUCTION
FORMAT
ORGANIZATION
* DATA FILE NAMES
* README
* READING DATA
GENERAL INFORMATION and DOCUMENTATION
ORDER SUPPORT
DISCLAIMER


INTRODUCTION

This product was produced by the U.S. Geological Survey (USGS) and contains
Landsat data files in GeoTIFF (Geographic Tagged Image-File Format).  The 
GeoTIFF files for Landsat 7 data are described in detail in the "Level 1 
Product Output Files Data Format Control Book, Volume 5, Book 2".  The 
"National Land Archive Production System (NLAPS) Systematic Format Description
Document" provides an overview of multiple product formats including GeoTIFF 
format for Landsats 1 through 5 and 7.

(Documents are obtainable at the Web site: 
http://edcwww.cr.usgs.gov/customer.html).


FORMAT

The Landsat data are provided in GeoTIFF for radiometrically and geometrically
corrected (level-1G) products.  GeoTIFF defines a set of publicly available 
TIFF tags that describe all cartographic and geodetic information associated 
with TIFF imagery.  GeoTIFF is a means for tying a raster image to a known 
model space or map projection, and for describing those projections.  The 
initial tags are followed by image data, that in turn, may be interrupted by 
more descriptive tags.  By using the GeoTIFF format, both metadata and image 
data can be encoded into the same file.


ORGANIZATION

Each band of Landsat data in the GeoTIFF format is delivered as a grayscale, 
uncompressed, 8-bit string of unsigned integers.  No other files accompany the 
product.

* DATA FILE NAMES

The file naming convention for GeoTIFF is as follows:

       L7fppprrr_rrrYYYYMMDD_AAA.TIF  where:
       L7                     = the Landsat mission.
       f                      = the ETM+ data format.
       ppp                    = the starting path of the product.
       rrr_rrr                = the starting and ending rows of the product.
       YYYYMMDD               = the acquisition date of an image.
       AAA                    = the file type:
          B10                      = the band 1
          B20                      = band 2
          B30                      = band 3
          B40                      = band 4
          B50                      = band 5
          B61                      = band 6L (low gain)
          B62                      = band 6H (high gain)
          B70                      = the band 7
          B80                      = the band 8
          TIF                      = the the GeoTIFF file extension.

* README

The README.TXT is a text file and is this document.

* READING DATA    
* Delivered On Tape - Data on 8-mm, high-density (Exabyte) tapes are tarred 
  Per Institute of Electrical and Electronics Engineers POSIX standard 
  1003.1, preserving file names.  To read a tar tape on a computer with a
  UNIX operating system, type:

     tar -xvf /<device name>

  Command key arguments include:
  x   = indicates that the data are to be read from tape.
  v   = requests verbose output (that is, processed file names will be listed).
  f   = indicates that the archive name is specified.

  The device name is system specific and may specify a device such as
  a tape drive or a file path.  Specific parameters depend upon local
  workstation configurations.

* Delivered On CDROM: Data files are not packed.  ISO 9660 Level 2.
* Delivered Via File Transfer Protocol (FTP): Data files are not packed 
  or compressed.
* Delivered On Digital Linear Tape (DLT): Data files are not packed or 
  compressed.  Surcharge required.


GENERAL INFORMATION and DOCUMENTATION

For information about the Landsat (1-5) Data Set, including tutorials and 
product standards, see:

    http://edcwww.cr.usgs.gov/satpage.html.

Information on the Landsat-7 Program, including information about the 
Landsat-7 satellite, the ETM+ sensor, and Landsat-7 data collection, is 
available in the "Landsat 7 Science Data Users Handbook."  For information 
about the Landsat 7 Data Set, including tutorials, product standards, and 
software, see:

    http://landsat7.usgs.gov/

No software is included on this product for viewing Landsat data. 


ORDER SUPPORT

Direct questions about orders to the USGS EROS Data Center's Customer Services 
at 1(800)252-4547 or contact an Earth Science Information Center (ESIC) office.  

The USGS EROS Data Center is available at:  

    http://edcwww.cr.usgs.gov/eros-home.html  

and Customer Services is available at:

    http://edcwww.cr.usgs.gov/customer.html

A list of ESIC offices is available at: 

    http://mapping.usgs.gov/esic/esic_index.html

For information about other USGS products, see: 

    http://mapping.usgs.gov/esic/to_order.html

or call 1-888-ASK USGS.


DISCLAIMER

Any use of trade, product, or firm names is for descriptive purposes only 
and does not imply endorsement by the U.S. Government.
