These Landsat 4 TM Collection 1 Tier 1 composites are made from Tier 1 orthorectified scenes, using the DN values, representing scaled, calibrated at-sensor radiance.
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.
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 Collection 1 Tier 1 composites are made from Tier 1 orthorectified scenes, using the DN values, representing scaled, calibrated at-sensor radiance. 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 …
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eThe Landsat 4 TM Collection 1 Tier 1 8-Day Raw Composite dataset provides 30-meter resolution imagery from August 21, 1982, to December 11, 1993.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset comprises 8-day composites of Landsat 4 TM scenes, utilizing the raw digital number (DN) values for at-sensor radiance.\u003c/p\u003e\n"],["\u003cp\u003eEach composite includes all scenes from an 8-day period, prioritizing the most recent pixel for the composite value.\u003c/p\u003e\n"],["\u003cp\u003eBands include blue, green, red, near-infrared, two shortwave infrared, thermal infrared, and a quality assessment band.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is publicly available and may be used without copyright restrictions, but USGS acknowledgement is requested.\u003c/p\u003e\n"]]],["The Landsat 4 TM Collection 1 Tier 1 dataset, provided by USGS/Google, spans from August 21, 1982, to December 11, 1993. It consists of 8-day composites of Landsat 4 images, with a 30-meter resolution and includes seven spectral bands (Blue, Green, Red, Near infrared, Shortwave infrared 1 and 2, and Thermal Infrared 1), plus a quality assessment band (BQA). Data is derived from Tier 1 orthorectified scenes. The most recent pixel per 8-day period is the composite value. The data is in the public domain.\n"],null,["# Landsat 4 TM Collection 1 Tier 1 8-Day Raw Composite\n\nDataset Availability\n: 1982-08-21T00:00:00Z--1993-12-11T00:00:00Z\n\nDataset Provider\n:\n\n\n [USGS/Google](https://landsat.usgs.gov/)\n\nTags\n:\n[8day](/earth-engine/datasets/tags/8day) [landsat](/earth-engine/datasets/tags/landsat) [raw](/earth-engine/datasets/tags/raw) [usgs](/earth-engine/datasets/tags/usgs) \n\n#### Description\n\nThese Landsat 4 TM Collection 1 Tier 1 composites are made from Tier 1 orthorectified scenes, using the DN values, representing scaled, calibrated at-sensor radiance.\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\n**Resolution**\n\n30 meters\n\n**Bands**\n\n| Name | Wavelength | Description |\n|-------|------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `B1` | 0.45 - 0.52 μm | Blue |\n| `B2` | 0.52 - 0.60 μm | Green |\n| `B3` | 0.63 - 0.69 μm | Red |\n| `B4` | 0.76 - 0.90 μm | Near infrared |\n| `B5` | 1.55 - 1.75 μm | Shortwave infrared 1 |\n| `B6` | 10.40 - 12.50 μm | Thermal Infrared 1. Resampled from 60m to 30m. |\n| `B7` | 2.08 - 2.35 μm | Shortwave infrared 2 |\n| `BQA` | | Landsat Collection 1 QA Bitmask ([See Landsat QA page](https://www.usgs.gov/land-resources/nli/landsat/landsat-collection-1-level-1-quality-assessment-band)) |\n| 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) ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\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 Collection 1 Tier 1 8-Day Raw Composite](/earth-engine/datasets/catalog/LANDSAT_LT04_C01_T1_8DAY_RAW) \nThese Landsat 4 TM Collection 1 Tier 1 composites are made from Tier 1 orthorectified scenes, using the DN values, representing scaled, calibrated at-sensor radiance. 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 ... \nLANDSAT/LT04/C01/T1_8DAY_RAW, 8day,landsat,raw,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/)"]]
