Long Term Archive
Landsat TM Image (San Diego, CA)
NOTE: 2016 Collection Management Implementation Plans
In 2016, the USGS will implement a collection management scheme for Landsat Level-1 products. This new scheme will provide a quality-controlled selection of radiometrically calibrated and consistently geolocated data with sufficiently geographically aligned pixels to support time series analysis through the full Landsat record. A number of changes are being made to support this effort, including incorporating new Landsat product identifiers and placing the scenes into a tier structure. More details about the Landsat Collection plans can be found on http://landsat.usgs.gov/landsatcollections.php.
The Landsat Thematic Mapper (TM) sensor was carried onboard Landsats 4 and 5 from July 1982 to May 2012 with a 16-day repeat cycle, referenced to the Worldwide Reference System-2. Very few images were acquired from November 2011 to May 2012. The satellite began decommissioning activities in January 2013.
Landsat 4-5 TM image data files consist of seven spectral bands (See band designations). The resolution is 30 meters for bands 1 to 7. (Thermal infrared band 6 was collected at 120 meters, but was resampled to 30 meters. The approximate scene size is 170 km north-south by 183 km east-west (106 mi by 114 mi).
Most Landsat 4-5 TM scenes are processed through the Level 1 Product Generation System (LPGS). Some TM scenes are processed through the National Land Archive Production System (NLAPS). All Landsat 4 TM scenes were processed through NLAPS prior to April 15, 2009.
|Product Type||L1T Terrain Corrected*|
|Pixel Size||30-meters (prior to February 25, 2010: thermal Band 6=60 meters)|
|Resampling method||cubic convolution (CC)|
|Map Projection||UTM – WGS 84
Polar Stereographic for the continent of Antarctica.
|Image Orientation||Map (North Up)|
|Distribution>||FTP Download Only|
|Delivery Time||Immediate for scenes already processed and ready for download.
1 to 3 days to process data and make available for download.
* While most Landsat scenes are processed with the Standard Terrain Correction (Level 1T), some scenes do not have the ground-control or elevation data necessary to perform these corrections. In these cases, the best level of correction is applied. (See Landsat Processing Details for details on correction levels.)
Specific Level 1T scenes are available for most of the globe under the Global Land Surveys (GLS) collections of 1975, 1990, 2000, 2005, and 2010. These datasets can be found on EarthExplorer or the USGS Global Visualization Viewer (GloVis).
Landsat 4-5 TM scenes held in the USGS archive can be searched using EarthExplorer, the USGS Global Visualization Viewer (GloVis), or the LandsatLook Viewer. (Only scenes with browse capability can be searched and downloaded from GloVis.)
Some Landsat 5 TM scenes outside the United States were collected and archived at International Ground Stations. The Landsat Global Archive Consolidation (LGAC) effort is underway to bring this data back to the USGS archive.
Data is delivered from the USGS only in digital format, with the parameters noted above. There are several commercial firms that may provide data in different formats, or printed images from USGS digital data.
For information on how to cite USGS data plus guidance on usage restrictions,
please see our Data Citations and Use page at https://lta.cr.usgs.gov/citation.
Any use of trade, firm, or product names is for descriptive purposes only and
does not imply endorsement by the U.S. Government.
Long Term Archive User Services
U.S. Geological Survey (USGS)
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