Landsat 7 Collection 1 Tier 1 Landsat 7 Collection 1 Tier 1 Annual Greenest-Pixel TOA Reflectance Composite

Dataset Availability

1999-01-01T00:00:00Z–2021-01-01T00:00:00Z

Dataset Provider

Google

Earth Engine Snippet

ee.ImageCollection("LANDSAT/LE07/C01/T1_ANNUAL_GREENEST_TOA")

Tags

annual greenest landsat toa usgs

Description

Landsat 7 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.

Note that Landsat 7's orbit has been drifting to an earlier acquisition time since 2017.

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).

Bands

Bands

Name	Pixel Size	Wavelength	Description
B1	30 meters	0.45 - 0.52 μm	Blue
B2	30 meters	0.52 - 0.60 μm	Green
B3	30 meters	0.63 - 0.69 μm	Red
B4	30 meters	0.77 - 0.90 μm	Near infrared
B5	30 meters	1.55 - 1.75 μm	Shortwave infrared 1
B6_VCID_1	60 meters	10.40 - 12.50 μm	Low-gain Thermal Infrared 1. This band has expanded dynamic range and lower radiometric resolution (sensitivity), with less saturation at high Digital Number (DN) values. Resampled from 60m to 30m.
B6_VCID_2	60 meters	10.40 - 12.50 μm	High-gain Thermal Infrared 1. This band has higher radiometric resolution (sensitivity), although it has a more restricted dynamic range. Resampled from 60m to 30m.
B7	30 meters	2.08 - 2.35 μm	Shortwave infrared 2
B8	15 meters	0.52 - 0.90 μm	Panchromatic
BQA	30 meters		Landsat Collection 1 QA Bitmask (See Landsat QA page)
Bitmask for BQA Bit 0: Designated Fill 0: No 1: Yes Bit 1: Designated Pixel 0: No 1: Yes Bits 2-3: Radiometric Saturation 0: No bands contain saturation 1: 1-2 bands contain saturation 2: 3-4 bands contain saturation 3: 5 or more bands contain saturation Bit 4: Cloud 0: No 1: Yes Bits 5-6: Cloud Confidence 0: Not Determined / Condition does not exist. 1: Low, (0-33 percent confidence) 2: Medium, (34-66 percent confidence) 3: High, (67-100 percent confidence) Bits 7-8: Cloud Shadow Confidence 0: Not Determined / Condition does not exist. 1: Low, (0-33 percent confidence) 2: Medium, (34-66 percent confidence) 3: High, (67-100 percent confidence) Bits 9-10: Snow / Ice Confidence 0: Not Determined / Condition does not exist. 1: Low, (0-33 percent confidence) 2: Medium, (34-66 percent confidence) 3: High, (67-100 percent confidence)
greenness	30 meters		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

See the USGS Visual Identity System Guidance for further details on proper citation and acknowledgement of USGS products.

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Code Editor (JavaScript)

// Import the dataset, filter to 2002, get the image.
var dataset = ee.ImageCollection('LANDSAT/LE07/C01/T1_ANNUAL_GREENEST_TOA')
                  .filterDate('2002-01-01', '2002-12-31')
                  .first();

// Get the greenness band.
var greenness = dataset.select('greenness');

// Get bands for true color RGB display.
var trueColor = dataset.select(['B3', 'B2', 'B1']);

// Define a mask for low greenness, make low greenness partially transparent.
var mask = dataset.select('greenness').gt(0.1).remap([0, 1], [0.5, 1]);

// Visualization parameters for greenness display.
var greennessVis = {
  min: 0.1,
  max: 0.85,
  palette: ['fffdcd', 'e1cd73', 'aaac20', '5f920c', '187328', '144b2a', '172313']
};

// Visualization parameters for true color display.
var trueColorVis = {
  min: 0.0,
  max: 0.4,
  gamma: 1.2,
};

// Display the layers on the map with mask applied.
Map.setCenter(43.4, 40.0, 7);
Map.addLayer(trueColor.updateMask(mask), trueColorVis, 'True Color (432)', false);
Map.addLayer(greenness.updateMask(mask), greennessVis, 'Greenness');

Open in Code Editor

Landsat 7 Collection 1 Tier 1 Landsat 7 Collection 1 Tier 1 Annual Greenest-Pixel TOA Reflectance Composite

Landsat 7 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. Note that Landsat 7's orbit has been drifting to an earlier acquisition time since 2017. These composites are created from all …

LANDSAT/LE07/C01/T1_ANNUAL_GREENEST_TOA, annual,greenest,landsat,toa,usgs

1999-01-01T00:00:00Z/2021-01-01T00:00:00Z

Google Earth Engine

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