AI-generated Key Takeaways
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This dataset provides Landsat 8 Collection 1 Tier 1 annual composites of the Normalized Difference Water Index (NDWI) from 2013 to 2022.
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The NDWI is derived from Near-IR and a second IR band and is sensitive to changes in the liquid water content of vegetation canopies.
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These composites are created from all scenes within each year, with the most recent pixel used as the composite value.
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This dataset has been superseded by LANDSAT/COMPOSITES/C02/T1_L2_ANNUAL_NDWI.
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Landsat datasets are in the public domain and can be used without copyright restriction, with acknowledgement of the USGS as the data source encouraged.
- Dataset Availability
- 2013-01-01T00:00:00Z–2022-01-01T00:00:00Z
- Dataset Provider
- Tags
Description
These Landsat 8 Collection 1 Tier 1 composites are made from Tier 1 orthorectified scenes, using the computed top-of-atmosphere (TOA) reflectance. See Chander et al. (2009) for details on the TOA computation.
The Normalized Difference Water Index (NDWI) is sensitive to changes in liquid water content of vegetation canopies. It is derived from the Near-IR band and a second IR band, ≈1.24μm when available and the nearest available IR band otherwise. It ranges in value from -1.0 to 1.0. See Gao (1996) 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 |
|---|---|---|
NDWI |
30 meters | Normalized Difference Water 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
See the USGS Visual Identity System Guidance for further details on proper citation and acknowledgement of USGS products.