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 MSS and TM Collection 1  Level-1 scenes that have processed into Tier 1.

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 

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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 the Landsat Data Access web page 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...

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. [scald=76195...

Why do Landsat 7 Level-1 products contain two thermal bands?

Landsat 7 acquires 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...

What Landsat data products are available?

There are several Landsat data products that are useful for science applications and land use/land change studies: Landsat Collections Level 1 - Ensures that the data in the Landsat Level-1 archive are consistent in processing and data quality to support time-series analyses and data stacking. Each Level-1 data product includes individual spectral...

Does the Landsat 7 Scan Line Corrector (SLC)-off artifact affect Landsat Collections tier designation?

The Landsat 7 SLC-off artifact does not change how the data are placed into Landsat Collection tiers, as tier classifications are determined by the radiometric and geometric accuracy of each scene. Learn more: Landsat Collections Landsat Data Access

What is Landsat 7 ETM+ SLC-off data?

Landsat 7 ETM+ SLC-off data 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. See the Landsat 7 website for information about the SLC-off...

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.
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Landsat 7 ETM+ Surface Reflectance
February 24, 2017

Landsat 7 ETM+ Surface Reflectance

Surface Reflectance Higher-Level Data Products at a 30-meter spatial resolution can be ordered for Landsat 7 Enhanced Thematic Mapper Collection 1 scenes. (1999-Present)

A satellite image of the Australian Outback
January 11, 2017

Landsat 7 Image of the Faded Marree Man

This Landsat 7 image, taken in July of 2000, shows the Marree Man faded from weathering. Credit: USGS/NASA Landsat Program.

Image shows a satellite view of Rotterdam Harbor
December 22, 2016

Landsat 7 View of Rotterdam Harbor

This Landsat 7 view of Rotterdam harbor, taken on September 28, 2001, predates the beginning of the Maasvlakte 2 port expansion project. Credit: USGS/NASA Landsat Program.

Satellite showing penguins track.
January 6, 2015

Landsat 7 helps track Antarctica's emperor penguins

Satellite image was used to track Antarctica's emperor penguins.

March 13, 2008

What is Landsat 7?

Listen to hear the answer.

Landsat 7 Enhanced Thematic Mapper Plus (ETM+) Level-1 Data
September 7, 1999

Landsat 7 Enhanced Thematic Mapper Plus (ETM+) Level-1 Data

Landsat 7 ETM+ SLC-on acquired September 7, 1999 (Path 46, Row 27)

Landsat Geometric Verify Image

Landsat Geometric Verify Image

The Landsat Geometric Verify Image and Report files are provided in Landsat 1-5 Multispectral Scanner (MSS) and Landsat 4-5 Thematic Mapper (TM) Collection 1 Tier 1 data products. The Verify Image file (_VER.jpg) displays a colored grid of verification points to represent the accuracy of geometric correction, using cross-correlation techniques to compare the product to the