Landsat Collection 2 Tier 1 Level 2 32-Day NDWI Composite

AI-generated Key Takeaways

• These Landsat Collection 2 Tier 1 Level 2 composites provide the Normalized Difference Water Index (NDWI), which is sensitive to changes in vegetation water content.

• The dataset is available from 1984 to 2025 with a 32-day cadence.

• The NDWI values range from -1.0 to 1.0 and are derived from Near-IR and a second IR band.

• Composites are created using all scenes within each 32-day period, with the most recent pixel value used.

• Landsat datasets are in the public domain and require acknowledgement of the U.S. Geological Survey as the data source.

Dataset Availability

1984-01-01T00:00:00Z–2025-10-16T00:00:00Z

Dataset Provider

Google

Earth Engine Snippet

ee.ImageCollection("LANDSAT/COMPOSITES/C02/T1_L2_32DAY_NDWI")

Cadence

32 Days

Tags

landsat

ndwi

usgs

vegetation-indices

Description

These Landsat Collection 2 Tier 1 Level 2 composites are made from Tier 1 Level 2 orthorectified scenes.

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 32-day period beginning from the first day of the year and continuing to the 352nd day of the year. The last composite of the year, beginning on day 353, will overlap the first composite of the following year by 20 days. All the images from each 32-day period are included in the composite, with the most recent pixel as the composite value.

Notes:

• The code used to create the composites can be seen here.

• Only daytime images with WRS_ROW < 122 are included.

• For Landsat 7 , images after 2017-01-01 are excluded due to orbital drift.

• For Landsat 8, images before 2013-05-01 are excluded due to pointing issues.

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.

Explore with Earth Engine

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('LANDSAT/COMPOSITES/C02/T1_L2_32DAY_NDWI')
                  .filterDate('2017-01-01', '2017-12-31');
var colorized = dataset.select('NDWI');
var colorizedVis = {
  min: 0.0,
  max: 1.0,
  palette: ['0000ff', '00ffff', 'ffff00', 'ff0000', 'ffffff'],
};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(colorized, colorizedVis, 'Colorized');

Open in Code Editor

Landsat Collection 2 Tier 1 Level 2 32-Day NDWI Composite

These Landsat Collection 2 Tier 1 Level 2 composites are made from Tier 1 Level 2 orthorectified scenes. 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 …

LANDSAT/COMPOSITES/C02/T1_L2_32DAY_NDWI, landsat,ndwi,usgs,vegetation-indices

1984-01-01T00:00:00Z/2025-10-16T00:00:00Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets