U.S. Geological Survey LEVEL-1 PRODUCT README: GeoTIFF TABLE OF CONTENTS INTRODUCTION FORMAT ORGANIZATION * DATA FILE NAMES * README * READING DATA GENERAL INFORMATION and DOCUMENTATION ORDER SUPPORT DISCLAIMER INTRODUCTION This product was created by the U.S. Geological Survey (USGS) and contains Landsat data files in Geographic Tagged Image-File Format (GeoTIFF). The Landsat 1, 2, and 3 satellites carried the multispectral scanner (MSS) sensors; the Landsat 4 and 5 satellites carries both the MSS and the thematic mapper (TM) sensors; and the Landsat-7 satellite carries the enhanced thematic mapper plus (ETM+) sensor. All three sensors are a part of an ongoing mission to provide quality remote sensing data in support of research and applications activities. Information on the Landsat 1 through 5 satellites is available at the Web sites: http://edc.usgs.gov/Webglis/glisbin/guide.pl/glis/hyper/guide/landsat http://edc.usgs.gov/Webglis/glisbin/guide.pl/glis/hyper/guide/landsat_tm 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 GeoTIFF files for Landsat-7 data are described in detail in the "Level 1 Product Output File, Data Format Control Book, L7-DFCB-04, Vol. 5, Book 2, Revision 5, April 2001". Other documents may be found on the Landsat-7 Documents Web page. Landsat-7 Level-0 and Level-1 Data Sets Document: http://eosims.cr.usgs.gov:5725/DATASET_DOCS/landsat7_dataset.html Level 1 Product Output File, Data Format Control Book, L7-DFCB-04, Vol. 5, Book2, Revision 5, April 2001: http://landsat7.usgs.gov/documents/dfcb/L1-409_DFCB_V5_B2_R5.pdf Landsat-7 Documents page: http://edcwww.cr.usgs.gov/l7dhf/L7MMO/document.htm 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. http://edc.usgs.gov/products/satellite/NLAPSII.pdf FORMAT 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 cartographic and geodetic information associated with TIFF images. GeoTIFF is a format that enables referencing a raster image to a known geodetic model or map projection. 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. For more information on GeoTIFF visit: http://www.remotesensing.org/geotiff/geotiff.html ORGANIZATION Each band of Landsat data in the GeoTIFF format is delivered as a grayscale, uncompressed, 8-bit string of unsigned integers. A metadata file (MTL) is included with Landsat-7 GeoTIFF orders. 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 = Landsat-7 mission f = ETM+ data format (1 or 2) ppp = starting path of the product rrr_rrr = starting and ending rows of the product YYYYMMDD = acquisition date of the image AAA = 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 = Level-1 metadata TIF = GeoTIFF file extension The file naming convention for other Landsat GeoTIFF is as follows: LTNppprrrOOYYDOY10_AA.TIF where: LT = Landsat thematic mapper N = satellite number. This should be validated against the satellite field if used exclusively ppp = starting path of the product rrr = starting row of the product OO = WRS row offset (set to 00) YY = last two digits of the year of acquisition DOY = Julian date of acquisition 1 = instrument mode 0 = instrument multiplexor (MUX) AA = file type: B1 = band 1 B2 = band 2 B3 = band 3 B4 = band 4 B5 = band 5 B6 = band 6 B7 = band 7 TIF = 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) tape and on digital linear tape (DLT) are tarred per Institute of Electrical and Electronics Engineers (IEEE) POSIX standard 1003.1, preserving file names. To read a tar tape on a computer with a UNIX operating system, type: tar -xvf / Command key arguments include: x = data are to be read from tape v = requests verbose output (that is, processed file names will be listed) f = archive name is specified The is system specific and may specify a device such as a tape drive or a file path. Specific parameters depend upon local server or workstation configurations. An example of extracting a specific directory from a tar-formatted tape: tar -xvf / 1 Other operating systems may require additional software for reading tar-formatted media. Delivered on compact disc (CD): Data files are not packed and conform to ISO 9660 Level-2 standards. Delivered via file transfer protocol (FTP): Data files are not packed or compressed. GENERAL INFORMATION and DOCUMENTATION For information about Landsat data sets, including tutorials, product standards, and software, see: For Landsat-7 http://landsat7.usgs.gov/ http://edcdaac.usgs.gov/ For Landsat (1-5) http://edc.usgs.gov/products/satellite/mss.html http://edc.usgs.gov/products/satellite/tm.html No software is included on this product for viewing Landsat data. FGDC metadata http://www.fgdc.gov/clearinghouse/clearinghouse.html 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. USGS EROS Data Center: http://edc.usgs.gov/ Customer Services: http://edc.usgs.gov/about/customer/index.html ESIC Office Listing: 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. Publication Date: April 29, 2002