Landsat 7 Collection 1 Tier 1 8-Day TOA Reflectance Composite

  • The Landsat 7 Collection 1 Tier 1 8-Day TOA Reflectance Composite dataset provides 8-day composites of Landsat 7 imagery.

  • The dataset covers the period from January 1, 1999, to December 27, 2021, and is available through Google Earth Engine.

  • Imagery is orthorectified and utilizes top-of-atmosphere (TOA) reflectance for analysis.

  • Includes various spectral bands, including blue, green, red, near-infrared, shortwave infrared, and thermal infrared, with pixel sizes ranging from 15 to 60 meters.

  • Landsat datasets are in the public domain and can be freely used with proper USGS acknowledgment.
LANDSAT/LE07/C01/T1_8DAY_TOA
Dataset Availability
1999-01-01T00:00:00Z–2021-12-27T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("LANDSAT/LE07/C01/T1_8DAY_TOA")
Tags
8day landsat toa usgs

Description

These Landsat 7 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.

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 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)

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.

These Landsat 7 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. These composites are created from all the scenes in each 8-day period beginning from the first day of …
LANDSAT/LE07/C01/T1_8DAY_TOA, 8day,landsat,toa,usgs
1999-01-01T00:00:00Z/2021-12-27T00:00:00Z
Google Earth Engine