Global Land Survey (GLS)
The U.S. Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA) collaborated from 2009 to 2011 to create the Global Land Surveys (GLS) datasets. Each of these collections were created using the primary Landsat sensor in use at the time for each collection epoch. The scenes used were a pre-collection format that met strict quality and cloud cover standards at the time the GLS files were created.
Additional details about the Global Land Survey collection can be found at http://landsat.usgs.gov/global-land-surveys-gls.
The Global Land Survey collection consists of images acquired from 1972 to 2012 combined into one dataset.
All Global Land Survey datasets contain the standard Landsat bands designated for each sensor. Band Designations can be found at http://landsat.usgs.gov/what-are-band-designations-landsat-satellites.
|Level of Processing||Terrain Corrected||Terrain Corrected||Terrain Corrected||Terrain Corrected||Terrain Corrected|
|Number of bands||8||8||8||7||4|
|Sensor||Landsat 5 Thematic Mapper (TM) Landsat 7 ETM+ OLI Landsat 8||Landat 7 ETM+||Landsat 5 Thematic Mapper (TM) Landsat 7 ETM+ EO-1 ALI||Landsat 4-5 Thematic Mapper (TM)||Landsat 1-3 Multispectral Scanner (MSS) Landsat 4-5* Multispectral Scanner (MSS) *Landsat 4-5 data were used to fill gaps in the Landsat 1-3 data|
|Dates||Images acquired from 2008 - 2012||Images acquired from 2003 - 2008||Images acquired from 1999 - 2003||Images acquired from 1987 - 1997||Images acquired from 1972 – 1983 Images acquired from 1982 - 1987|
|Projection||Universal Transverse Mercator (UTM)||Universal Transverse Mercator (UTM)||Universal Transverse Mercator (UTM)||Universal Transverse Mercator (UTM)||Universal Transverse Mercator (UTM)|
|Resampling||Cubic Convolution||Cubic Convolution||Cubic Convolution||Cubic Convolution||Cubic Convolution|
*Many scenes process to complete Terrain Correction (L1T). Some scenes may process to Systematic Correction (L1G) only.
Data Use and Citation Policies
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.
Contact Information for User Assistance
U.S. Geological Survey (USGS)
Earth Resources Observation and Science (EROS) Center
47914 252nd Street
Sioux Falls, SD 57198-0001
Phone Number: 605-594-6151
Toll Free: 800-252-4547
Business Hours: Monday thru Friday, 8:00 a.m. to 4:00 p.m., Central Time