These Landsat 7 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 7 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 …
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["This Landsat 7 dataset provides annual composites of the Normalized Difference Snow Index (NDSI) from 1999 to 2017."],["The dataset is deprecated and has been superseded by a Collection 1-based dataset (LANDSAT/LE07/C01/T1_ANNUAL_NDSI)."],["NDSI is calculated using Green and Mid-IR bands to identify snow cover, ranging from -1.0 to 1.0."],["Composites are created annually using all scenes from the year, prioritizing the most recent pixel."],["Landsat data is public domain, but requires acknowledgement of the USGS as the data source."]]],["This Landsat 7 dataset, provided by USGS, contains annual composites from 1999 to 2017, using Level L1T orthorectified scenes and top-of-atmosphere (TOA) reflectance. It focuses on the Normalized Difference Snow Index (NDSI), calculated from Green and Mid-IR bands to identify snow. Composites are created annually from all available scenes. The dataset is now complete and superseded by LANDSAT/LE07/C01/T1_ANNUAL_NDSI, and users should transition to the newer Collection 1-based dataset. Landsat data is public domain.\n"]]
