EROS DATA CENTER
LEVEL 1 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).
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 Level-0 and Level-1 Data Sets Document."  The
"National Land Archive Production System (NLAPS) Systematic Format Description
Document" provides an overview of multiple product formats including GeoTIFF
format for Landsats 4, 5 and 7.  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."

Landsat-7 Level-0 and Level-1 Data Sets Document
http://eosims.cr.usgs.gov:5725/DATASET_DOCS/landsat7_dataset.html

National Land Archive Production System (NLAPS) Systematic Format Description
Document
http://edcwww.cr.usgs.gov/customer.html

Level 1 Product Output Files Data Format Control Book
http://edcwww.cr.usgs.gov/l7dhf/L7MMO/document.htm


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 Landsat 7 GeoTIFF is as follows:

L7fppprrr_rrrYYYYMMDD_AAA.TIF  where:
L7	= the Landsat-7 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	= 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	= band 7 
B80	= band 8
MTL	= the metadata file
TIF	= the GeoTIFF file extension

The file naming convention for other Landsat GeoTIFF is as follows:

LTNppprrrOOYYDOY10_AA.TIF  where:
LT	= the Landsat Thematic Mapper
N	= the satellite number.  This should be validated against the satellite
          field if used exclusively
ppp	= the starting path of the product
rrr	= the starting row of the product
OO	= the WRS row offset (set to 00)
YY	= the last two digits of the year of acquisition
DOY	= the Julian date of acquisition
1 = the instrument mode:
0	= the instrument multiplexor (MUX)	
AA	= the file type:
B1	= band 1
B2	= band 2
B3	= band 3
B4	= band 4
B5	= band 5
B6	= band 6
B7	= band 7 
TIF	= the GeoTIFF file extension

* README

The README.GTF 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.


GENERAL INFORMATION and DOCUMENTATION

For information about the Landsat Data Sets, including tutorials, product
standards, and software, see:

	For Landsat 7
http://landsat7.usgs.gov/

	For Landsat (1-5)
http://edcwww.cr.usgs.gov/satpage.html

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://ask.usgs.gov/

or call 1-888-ASK USGS (275-8747).


DISCLAIMER

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