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 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
8-day period beginning from the first day of the year and continuing
to the 360th day of the year. The last composite of the year,
beginning on day 361, will overlap the first composite of the
following year by 3 days. All the images from each 8-day period 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
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis Landsat 4 TM dataset provides 8-day Normalized Difference Water Index (NDWI) composites derived from Level L1T orthorectified scenes.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from August 21, 1982, to December 11, 1993, and is now complete, as USGS is no longer producing Pre-Collection Landsat.\u003c/p\u003e\n"],["\u003cp\u003eUsers are recommended to switch to the updated Collection 1-based dataset: LANDSAT/LT04/C01/T1_8DAY_NDWI.\u003c/p\u003e\n"],["\u003cp\u003eThe NDWI values range from -1.0 to 1.0 and are sensitive to changes in liquid water content of vegetation canopies.\u003c/p\u003e\n"],["\u003cp\u003eLandsat datasets are in the public domain and can be used freely with proper USGS acknowledgment.\u003c/p\u003e\n"]]],[],null,["# Landsat 4 TM 8-Day NDWI Composite [deprecated]\n\n**Caution:** This dataset has been superseded by [LANDSAT/LT04/C01/T1_8DAY_NDWI](/earth-engine/datasets/catalog/LANDSAT_LT04_C01_T1_8DAY_NDWI). \n\nDataset Availability\n: 1982-08-21T00:00:00Z--1993-12-11T00:00:00Z\n\nDataset Provider\n:\n\n\n [USGS](https://landsat.usgs.gov/)\n\nTags\n:\n[8day](/earth-engine/datasets/tags/8day) [landsat](/earth-engine/datasets/tags/landsat) [ndwi](/earth-engine/datasets/tags/ndwi) [usgs](/earth-engine/datasets/tags/usgs) \n\n#### Description\n\nThese Landsat 4 TM composites are made from Level L1T orthorectified scenes, using the\ncomputed top-of-atmosphere (TOA) reflectance. See [Chander et al.\n(2009)](https://www.sciencedirect.com/science/article/pii/S0034425709000169)\nfor details on the TOA computation.\n\nAs 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](https://developers.google.com/earth-engine/landsat) for more information.\n\nThe Normalized Difference Water Index (NDWI) is sensitive\nto changes in liquid water content of vegetation canopies. It is\nderived from the Near-IR band and a second IR band, ≈1.24μm when\navailable and the nearest available IR band otherwise. It ranges in\nvalue from -1.0 to 1.0. See\n[Gao (1996)](https://www.sciencedirect.com/science/article/pii/S0034425796000673)\nfor details.\n\nThese composites are created from\nall the scenes in each\n8-day period beginning from the first day of the year and continuing\nto the 360th day of the year. The last composite of the year,\nbeginning on day 361, will overlap the first composite of the\nfollowing year by 3 days. All the images from each 8-day period are\nincluded in the composite, with the most recent pixel as the composite value.\n\n### Bands\n\n**Bands**\n\n| Name | Pixel Size | Description |\n|--------|------------|-----------------------------------|\n| `NDWI` | 30 meters | Normalized Difference Water Index |\n\n### Terms of Use\n\n**Terms of Use**\n\nLandsat datasets are federally created data\nand therefore reside in the public domain and may be used, transferred, or reproduced without copyright restriction.\n\nAcknowledgement or credit of the USGS as data source should be provided\nby including a line of text citation such as the example shown below.\n\n(Product, Image, Photograph, or Dataset Name) courtesy of\nthe U.S. Geological Survey\n\nExample: Landsat-7 image courtesy of the U.S. Geological Survey\n\nSee the\n[USGS Visual Identity System Guidance](https://www.usgs.gov/information-policies-and-instructions/usgs-visual-identity-system)\nfor further details on proper citation and acknowledgement of USGS products.\n**Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine) \n[Landsat 4 TM 8-Day NDWI Composite \\[deprecated\\]](/earth-engine/datasets/catalog/LANDSAT_LT4_L1T_8DAY_NDWI) \nThese 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 ... \nLANDSAT/LT4_L1T_8DAY_NDWI, 8day,landsat,ndwi,usgs \n1982-08-21T00:00:00Z/1993-12-11T00:00:00Z \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://landsat.usgs.gov/)"]]
