Las Vegas, Nevada and the area surrounding has been and remains a popular region of interest when showcasing urban growth and land change using Landsat sensors.
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.
Media
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Gap Mask Legend Values:
- green = primary scene
- blue = fill scene 1
- yellow = fill scene 2
- pink = fill scene 3
- red = no data (not filled)
For a standard SLC-off product, the data values contained within the gap mask file are:
- Value of 0 - No data (data were missing in the original SLC-off scene)
- Value of 1 - Populated data (data were present in the original SLC-off scene)
Learn more: Landsat 7 web page
Related
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
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 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...
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.
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...
What are the best Landsat spectral bands for use in my research?
The Spectral Characteristics Viewer is an interactive tool that can be used to visualize how the bands, or channels, of different satellite sensors measure the intensity of the many wavelengths (colors) of light. This is also known as the relative spectral response (RSR). By overlaying the spectral curves from different features (spectra), one can determine which bands of the selected sensor will...
Landsat 7 Images of Las Vegas, 1999-2024
Las Vegas, Nevada and the area surrounding has been and remains a popular region of interest when showcasing urban growth and land change using Landsat sensors.
Daily Operations of Landsat 7
What it takes each day to keep Landsat 7 operating smoothly. Hear the stories from inside the L7 Mission Operation Center.
What it takes each day to keep Landsat 7 operating smoothly. Hear the stories from inside the L7 Mission Operation Center.
Landsat 7 100,000th orbit image
Landsat 7 satellite image from February 1, 2018, acquired on Landsat 7's 100,000th orbit.
Landsat 7 satellite image from February 1, 2018, acquired on Landsat 7's 100,000th orbit.
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.
The Optimist
On the edge of the Kalahari Desert in Namibia, sand dunes are encroaching onto once-fertile lands in the north. Healthy vegetation appears red in this image; in the center, notice the lone red dot. It is the result of a center-pivot irrigation system, evidence that at least one optimistic farmer continues to work the fields despite the approaching sand.
On the edge of the Kalahari Desert in Namibia, sand dunes are encroaching onto once-fertile lands in the north. Healthy vegetation appears red in this image; in the center, notice the lone red dot. It is the result of a center-pivot irrigation system, evidence that at least one optimistic farmer continues to work the fields despite the approaching sand.
Bolivian Deforestation
Once a vast carpet of healthy vegetation, the Amazon rain forest is changing rapidly. This image of Bolivia shows dramatic deforestation in the Amazon Basin. Loggers have cut long paths into the forest, while ranchers have cleared large blocks for their herds. Fanning out from these clear-cut areas are settlements built in radial arrangements of fields and farms.
Once a vast carpet of healthy vegetation, the Amazon rain forest is changing rapidly. This image of Bolivia shows dramatic deforestation in the Amazon Basin. Loggers have cut long paths into the forest, while ranchers have cleared large blocks for their herds. Fanning out from these clear-cut areas are settlements built in radial arrangements of fields and farms.
Parana River Delta
The Parana River delta is a huge forested marshland about 32km northeast of Buenos Aires, Argentina. The area is a very popular tour destination. Guided boat tours can be taken into this vast labyrinth of marsh and trees. The Parana River delta is one of the world's greatest bird-watching destinations.
The Parana River delta is a huge forested marshland about 32km northeast of Buenos Aires, Argentina. The area is a very popular tour destination. Guided boat tours can be taken into this vast labyrinth of marsh and trees. The Parana River delta is one of the world's greatest bird-watching destinations.
1999 Landsat 7 Launch
Landsat 7 was successfully launched on April 15, 1999, from the Western Test Range of Vandenberg Air Force Base, California, on a Delta II expendable launch vehicle. EROS History Project
Landsat 7 was successfully launched on April 15, 1999, from the Western Test Range of Vandenberg Air Force Base, California, on a Delta II expendable launch vehicle. EROS History Project
Related
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
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 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...
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.
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...
What are the best Landsat spectral bands for use in my research?
The Spectral Characteristics Viewer is an interactive tool that can be used to visualize how the bands, or channels, of different satellite sensors measure the intensity of the many wavelengths (colors) of light. This is also known as the relative spectral response (RSR). By overlaying the spectral curves from different features (spectra), one can determine which bands of the selected sensor will...
Landsat 7 Images of Las Vegas, 1999-2024
Las Vegas, Nevada and the area surrounding has been and remains a popular region of interest when showcasing urban growth and land change using Landsat sensors.
Las Vegas, Nevada and the area surrounding has been and remains a popular region of interest when showcasing urban growth and land change using Landsat sensors.
Daily Operations of Landsat 7
What it takes each day to keep Landsat 7 operating smoothly. Hear the stories from inside the L7 Mission Operation Center.
What it takes each day to keep Landsat 7 operating smoothly. Hear the stories from inside the L7 Mission Operation Center.
Landsat 7 100,000th orbit image
Landsat 7 satellite image from February 1, 2018, acquired on Landsat 7's 100,000th orbit.
Landsat 7 satellite image from February 1, 2018, acquired on Landsat 7's 100,000th orbit.
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.
The Optimist
On the edge of the Kalahari Desert in Namibia, sand dunes are encroaching onto once-fertile lands in the north. Healthy vegetation appears red in this image; in the center, notice the lone red dot. It is the result of a center-pivot irrigation system, evidence that at least one optimistic farmer continues to work the fields despite the approaching sand.
On the edge of the Kalahari Desert in Namibia, sand dunes are encroaching onto once-fertile lands in the north. Healthy vegetation appears red in this image; in the center, notice the lone red dot. It is the result of a center-pivot irrigation system, evidence that at least one optimistic farmer continues to work the fields despite the approaching sand.
Bolivian Deforestation
Once a vast carpet of healthy vegetation, the Amazon rain forest is changing rapidly. This image of Bolivia shows dramatic deforestation in the Amazon Basin. Loggers have cut long paths into the forest, while ranchers have cleared large blocks for their herds. Fanning out from these clear-cut areas are settlements built in radial arrangements of fields and farms.
Once a vast carpet of healthy vegetation, the Amazon rain forest is changing rapidly. This image of Bolivia shows dramatic deforestation in the Amazon Basin. Loggers have cut long paths into the forest, while ranchers have cleared large blocks for their herds. Fanning out from these clear-cut areas are settlements built in radial arrangements of fields and farms.
Parana River Delta
The Parana River delta is a huge forested marshland about 32km northeast of Buenos Aires, Argentina. The area is a very popular tour destination. Guided boat tours can be taken into this vast labyrinth of marsh and trees. The Parana River delta is one of the world's greatest bird-watching destinations.
The Parana River delta is a huge forested marshland about 32km northeast of Buenos Aires, Argentina. The area is a very popular tour destination. Guided boat tours can be taken into this vast labyrinth of marsh and trees. The Parana River delta is one of the world's greatest bird-watching destinations.
1999 Landsat 7 Launch
Landsat 7 was successfully launched on April 15, 1999, from the Western Test Range of Vandenberg Air Force Base, California, on a Delta II expendable launch vehicle. EROS History Project
Landsat 7 was successfully launched on April 15, 1999, from the Western Test Range of Vandenberg Air Force Base, California, on a Delta II expendable launch vehicle. EROS History Project
Updated Date: February 19, 2025