Satellite image from Landsat 7 which was used to track Antarctica's emperor penguins.
What are the _VER.jpg and _VER.txt files that are included with the Landsat MSS and TM data?
The Verify Image (_VER.jpg) and Geometric Verify Report (_VER.txt) files are included with Landsat Multispectral Scanner (MSS) and Thematic Mapper (TM) Level-1 data that have processed into Tier 1 products.
The Verify Image File displays a colored grid of verification points to represent the accuracy of geometric correction, using cross-correlation techniques to compare the product to the GLS 2000 reference dataset. This graphic representation of the Geometric Verify Report (_VER.txt) assists users in determining the geometric accuracy of each MSS and TM precision- and terrain-corrected scene.
Learn more: Landsat Geometric Verify Image and Report
Related
Why do Landsat 7 Level-1 products contain two thermal bands?
Landsat 7 acquired thermal data in two bands from one detector in both high (Band 6H) and low (Band 6L) gain. The difference in gain settings is important to different types of studies (i.e., clouds vs. deserts). Aside from the resolution differences and saturation on the high and low ends, the two bands provide the same Digital Numbers (DN) for every pixel. FILE_NAME_BAND_6_VCID_1 (band 61 or 6L)...
What are Landsat 7 SLC-off Gap Mask files?
Band-specific gap mask files are included with every Landsat 7 Scan Line Corrector (SLC)-off Level-1 data product. These ancillary data identify the location of all pixels affected by the original data gaps in the primary SLC-off scene. The gap mask is provided as a series of individual band files, in compressed (GZIP) GeoTIFF format. Gap Mask Legend Values: green = primary scene blue = fill scene...
What is Landsat 7 ETM+ SLC-off data?
Landsat 7 ETM+ SLC-off refers to all Landsat 7 images collected after May 31, 2003, when the Scan Line Corrector (SLC) failed. These products have data gaps but are still useful and maintain the same radiometric and geometric corrections as data collected prior to the SLC failure. The Landsat 7 satellite acquired science data until January 19, 2024. Learn more: Landsat 7
What Landsat products are available?
There are several Landsat Collection 2 products that are useful for science applications and land use/land change studies: Landsat Level-1 Products - Each Level-1 product includes individual spectral band files, a metadata file, and additional ancillary files. Level-1 products are available for all global landmasses. Landsat U.S. Analysis Ready Data (ARD) - U.S. ARD uses Landsat Level-1 data as...
How do I search for and download Landsat data?
Landsat data products held in the USGS archives can be searched and downloaded at no charge from a variety of sources. Visit Landsat Data Access for information about how Landsat data products can be downloaded individually or in bulk. Landsat imagery not found in the USGS archive might have been collected by one of the USGS International Cooperator ground stations, each of which are the primary...
What are some known issues that users might find in Landsat data?
A number of artifacts and anomalies can happen to any remote sensing data. Banding, dropped scan lines, and detector failures are only a few of the anomalies that can be seen in Landsat data. Go to Landsat Known Issues for details about anomalies that have been discovered and investigated.
Landsat 7 helps track Antarctica's emperor penguins
Satellite image from Landsat 7 which was used to track Antarctica's emperor penguins.
What is Landsat 7?
In 1992, The U.S. Congress authorized the procurement, launch, and operation of a new Landsat satellite. This new system, Landsat 7, was launched in April 1999. It is the latest in a series of Earth observations satellites dating back to 1972.
In 1992, The U.S. Congress authorized the procurement, launch, and operation of a new Landsat satellite. This new system, Landsat 7, was launched in April 1999. It is the latest in a series of Earth observations satellites dating back to 1972.
Related
Why do Landsat 7 Level-1 products contain two thermal bands?
Landsat 7 acquired thermal data in two bands from one detector in both high (Band 6H) and low (Band 6L) gain. The difference in gain settings is important to different types of studies (i.e., clouds vs. deserts). Aside from the resolution differences and saturation on the high and low ends, the two bands provide the same Digital Numbers (DN) for every pixel. FILE_NAME_BAND_6_VCID_1 (band 61 or 6L)...
What are Landsat 7 SLC-off Gap Mask files?
Band-specific gap mask files are included with every Landsat 7 Scan Line Corrector (SLC)-off Level-1 data product. These ancillary data identify the location of all pixels affected by the original data gaps in the primary SLC-off scene. The gap mask is provided as a series of individual band files, in compressed (GZIP) GeoTIFF format. Gap Mask Legend Values: green = primary scene blue = fill scene...
What is Landsat 7 ETM+ SLC-off data?
Landsat 7 ETM+ SLC-off refers to all Landsat 7 images collected after May 31, 2003, when the Scan Line Corrector (SLC) failed. These products have data gaps but are still useful and maintain the same radiometric and geometric corrections as data collected prior to the SLC failure. The Landsat 7 satellite acquired science data until January 19, 2024. Learn more: Landsat 7
What Landsat products are available?
There are several Landsat Collection 2 products that are useful for science applications and land use/land change studies: Landsat Level-1 Products - Each Level-1 product includes individual spectral band files, a metadata file, and additional ancillary files. Level-1 products are available for all global landmasses. Landsat U.S. Analysis Ready Data (ARD) - U.S. ARD uses Landsat Level-1 data as...
How do I search for and download Landsat data?
Landsat data products held in the USGS archives can be searched and downloaded at no charge from a variety of sources. Visit Landsat Data Access for information about how Landsat data products can be downloaded individually or in bulk. Landsat imagery not found in the USGS archive might have been collected by one of the USGS International Cooperator ground stations, each of which are the primary...
What are some known issues that users might find in Landsat data?
A number of artifacts and anomalies can happen to any remote sensing data. Banding, dropped scan lines, and detector failures are only a few of the anomalies that can be seen in Landsat data. Go to Landsat Known Issues for details about anomalies that have been discovered and investigated.
Landsat 7 helps track Antarctica's emperor penguins
Satellite image from Landsat 7 which was used to track Antarctica's emperor penguins.
Satellite image from Landsat 7 which was used to track Antarctica's emperor penguins.
What is Landsat 7?
In 1992, The U.S. Congress authorized the procurement, launch, and operation of a new Landsat satellite. This new system, Landsat 7, was launched in April 1999. It is the latest in a series of Earth observations satellites dating back to 1972.
In 1992, The U.S. Congress authorized the procurement, launch, and operation of a new Landsat satellite. This new system, Landsat 7, was launched in April 1999. It is the latest in a series of Earth observations satellites dating back to 1972.
Updated Date: September 24, 2024