Landst-7 Enhanced Theamatic Mapper + Readme File

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.

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 /

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.