Landsat 4 TM Collection 1 Tier 1
calibrated top-of-atmosphere (TOA) reflectance.
Calibration coefficients are extracted from the image metadata.
See Chander et al. (2009)
for details on the TOA computation.
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 greenest pixel as the composite value, where
the greenest pixel means the pixel with the highest value of
the Normalized Difference Vegetation Index (NDVI).
The pixel with the highest value of the Normalized Difference Vegetation Index (NDVI) for the year covered by the image.
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
Landsat 4 TM Collection 1 Tier 1 calibrated top-of-atmosphere (TOA) reflectance. Calibration coefficients are extracted from the image metadata. See Chander et al. (2009) for details on the TOA computation. These composites are created from all the scenes in each annual period beginning from the first day of the year …
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["This dataset provides Landsat 4 TM Collection 1 Tier 1 annual greenest-pixel composites with top-of-atmosphere (TOA) reflectance from 1982 to 1993."],["The greenest pixel is selected based on the highest Normalized Difference Vegetation Index (NDVI) value for each year."],["Data is at 30-meter resolution and includes spectral bands such as blue, green, red, near-infrared, and shortwave infrared."],["Landsat data is public domain and can be used freely with proper USGS citation."],["Google Earth Engine provides access to this dataset for analysis and visualization."]]],["The Landsat 4 TM Collection 1 Tier 1 dataset, available from 1982 to 1993 via Google Earth Engine, provides annual composites of top-of-atmosphere (TOA) reflectance. Composites are created annually, selecting the \"greenest\" pixel with the highest NDVI value from each year's images. The data, with a 30-meter resolution, includes seven spectral bands, a quality assessment (BQA) band, and a greenness index. It is free to use for research, education and nonprofit. The data is public domain and must be acknowledge using \"U.S. Geological Survey\".\n"]]
