These Landsat 4 TM composites are made from Level L1T orthorectified scenes, using the
computed top-of-atmosphere (TOA) reflectance. See Chander et al.
(2009)
for details on the TOA computation.
As of May 1, 2017, the USGS is no longer producing Pre-Collection Landsat, and therefore this collection is complete. Please switch to a Collection 1-based dataset. See this documentation page for more information.
The Normalized Difference Snow Index is used to
identify snow, based on its characteristically higher reflectance in
the visible portion of the spectrum compared to the mid-IR. NDSI is
computed using the Green and Mid-IR bands, and has a range of -1.0 to
1.0. See
Riggs et al. (1994)
for details.
These composites are created from
all the scenes in
each annual period beginning from the first day of the year and
continuing to the last day of the year. All the images from each year
are included in the composite, with the most recent pixel as the composite value.
Bands
Bands
Name
Pixel Size
Description
NDSI
30 meters
Normalized Difference Snow Index
Terms of Use
Terms of Use
Landsat datasets are federally created data
and therefore reside in the public domain and may be used, transferred, or reproduced without copyright restriction.
Acknowledgement or credit of the USGS as data source should be provided
by including a line of text citation such as the example shown below.
(Product, Image, Photograph, or Dataset Name) courtesy of
the U.S. Geological Survey
Example: Landsat-7 image courtesy of the U.S. Geological Survey
These Landsat 4 TM composites are made from Level L1T orthorectified scenes, using the computed top-of-atmosphere (TOA) reflectance. See Chander et al. (2009) for details on the TOA computation. As of May 1, 2017, the USGS is no longer producing Pre-Collection Landsat, and therefore this collection is complete. Please switch …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["This Landsat 4 TM dataset provides annual Normalized Difference Snow Index (NDSI) composites from 1982 to 1993."],["It has been superseded by a newer Collection 1 dataset, LANDSAT/LT04/C01/T1_ANNUAL_NDSI, and is no longer updated."],["The NDSI values range from -1.0 to 1.0 and are calculated using Green and Mid-IR bands to identify snow cover."],["The dataset is freely available for research, education, and non-profit use, with proper USGS citation recommended."],["Composites include all scenes within each year, using the most recent pixel for the final value."]]],["This Landsat 4 dataset, provided by USGS, spans from 1982 to 1993 and is now superseded. It uses Level L1T orthorectified scenes with top-of-atmosphere reflectance to create annual composites. The Normalized Difference Snow Index (NDSI), derived from Green and Mid-IR bands with values from -1.0 to 1.0, is used to identify snow. The dataset is complete and public domain. It's recommended to use Collection 1-based datasets, and cite the USGS when using this data.\n"]]
