LANDSAT Product Information

• ·  Landsat 1-5 Multispectral Scanner (MSS)
• ·  Landsat 4-5 Thematic Mapper (TM)
• ·  Landsat 4-7 MSS, TM, and ETM+ Combined

• For Landsat 4 and 5 MSS, the images are displayed as RGB composites, bands 4, 2, and 1, with a 2% linear stretch. For Landsat 1, 2, and 3 MSS, the RGB composites are created from bands 7, 5, and 4.
• Images are resampled to a pixel size of 240 meters from the original nominal 80-meter data.
• In the full resolution browse view, the MSS images may appear to be one-fourth the size of the Landsat 7 browse images because of the processing used to create the browse, but the actual MSS scene will cover approximately the same area (185 x 170 km).
• The full-resolution browse images are displayed as JPEG compressed files with an average file size of ~50K. For the 1000-meter display mode, the browse images are GIFs with an average file size of ~35K.

• The images are displayed as RGB composites, bands 5, 4, and 3, with 2% linear stretch applied.
• Images are resampled to a pixel size of 240 meters from the original 28.5-meter data.
• In the original resolution browse view, the Landsat 4 and 5 browse images may appear to be one-fourth the size of the Landsat 7 browse images because of the processing used to create the browse, but the actual TM scene will cover approximately the same area (183 x 170 km).
• The full-resolution browse images are displayed as JPEG compressed files with an average file size of ~50K. For the 1000-meter display mode, the browse images are GIFs with an average file size of ~35K.
• The original browse previews that are used to create the full-resolution browse images are uncorrected images in satellite orientation, and they can be viewed in a separate window.

• These images are from Landsat ETM+, Landsat ETM+ SLC-off, Landsat TM, and Landsat 4 and 5 MSS – all the Landsat sensors that utilize World Reference Ssystem-2 (WRS-2). The scenes are merged together in chronological order to enable easy browsing through the various sensors. Scenes from any of the sensors can be searched, previewed, and ordered simultaneiously.
• When an image is selected, it is outlined by a color that is unique to each sensor.

• Because of the large quantity of scenes for the combined datasets, loading the inventory will be very time consuming when using dialup internet or other slow connections.
• For details on the individual Landsat sensors, please refer to the specific sensor information above.
• When scenes are added to the combined sensor scene list, they will also be added to the scene list for that corresponding sensor. Conversely, adding scenes to the list for an individual sensor will be reflected in the combined sensor scene list. All other scene list features will be handled in the same way.

• ·  Landsat 7 Enhanced Thematic Mapper Plus (ETM+)
• ·  Landsat 7 Enhanced Thematic Mapper Plus (ETM+) Scan Line Corrector Off (SLC-Off)
• ·  Tri-Decadal ETM+ (1999-2003)
• ·  Tri-Decadal ETM+ Pan (1999-2003)
• ·  Tri-Decadal ETM+ Pan Mosaics
• ·  Tri-Decadal TM (1987-1997)
• ·  Tri-Decadal TM Mosaics
• ·  Tri-Decadal MSS 4-5 (1982-1987)
• ·  Tri-Decadal MSS 1-3 (1972-1983)

• Images acquired from June 1999 – May 2003 are displayed as RGB composites, bands 5, 4, and 3.
• Images are resampled to a pixel size of 240 meters from the original 30-meter data.
• Each Landsat 7 scene is color-stretched based on individual scene content. This may result in an apparent mismatch of colors between scenes.
• The full-resolution browse images are displayed as JPEG compressed files with an average file size of ~130K. In the 1000-meter display mode, the browse images are GIFs with an average file size of ~35K.
• The original browse previews that are used to create the full-resolution browse images are uncorrected images in satellite orientation, and they can be viewed in a separate window.

• Images acquired after July 2003 are displayed as RGB composites, bands 5, 4, and 3. Landsat 7 ETM+ scenes acquired from 5/31/03 – 7/14/03 and 9/3/03 – 9/17/03 are not available.
• Images are resampled to a pixel size of 180 meters from the original 30-meter data.
• The “Show Browse” option displays an overlay that illustrates the approximate extent of the SLC-off image gaps.
• Each Landsat 7 scene is color-stretched based on individual scene content. This may result in an apparent mismatch of colors between scenes.
• The full-resolution browse images are displayed as JPEG compressed files with an average file size of ~130K. In the 1000-meter display mode, the browse images are GIFs with an average file size of ~35K.
• The original browse previews that are used to create the full-resolution browse images are uncorrected images in satellite orientation, and they can be viewed in a separate window.
• When ordering this data, a Warning Box will pop up as a reminder that you are attempting to order SLC-off data.
• For more information on SLC-Off data, please see the Landsat FAQ.

• The Tri-Decadal Global Landsat Orthorectified (previously Landsat Orthorectified) ETM+ browse images are displayed as a 5,4,3 (RGB) color composite.
• Pixels are subsampled to a resolution of 240 meters from the original 30-meter data.
• Each Landsat 7 scene is color-stretched based on individual scene content. This may result in an apparent mismatch of colors between scenes.
• For the full-resolution browses, the images are JPEG compressed with an average file size of 147K. For the 1000 meter display mode, the browse images are GIFs with an average file size of 8K.
• The original browse images (viewed in a separate browser window) are raw browse in satellite orientation.
• Full-resolution data may be downloaded at no charge.

• The Tri-Decadal Global Landsat Orthorectified (previously Landsat Orthorectified) ETM+ Pan browse images are displayed as a 7,4,2 (RGB) color composite.
• Pixels are subsampled to a resolution of 240 meters from the original 30-meter data.
• Each Landsat 7 scene is color-stretched based on individual scene content. This may result in an apparent mismatch of colors between scenes.
• For the full-resolution browses, the images are JPEG compressed with an average file size of 147K. For the 1000 meter display mode, the browse images are GIFs with an average file size of 8K.
• The original browse images (viewed in a separate browser window) are raw browse in satellite orientation.
• Full-resolution data may be downloaded at no charge.

• The Tri-Decadal Global Landsat Orthorectified ETM+ Pan Mosaic browse images are displayed as a 7,4,2 (RGB) color composite.
• Pixels are subsampled to a resolution of 285 meters from the original 30-meter data.
• The mosaics cover a 5 degree (north-south) segment of a standard 6 degree wide (east-west) UTM zone. It is further subdivided into four 2.5 degree by 3 degree quadrants.
• The original browse images (viewed in a separate browser window) were generated from full-resolution data that is orthorectified and UTM-projected, using the World Geodetic System 1984 datum.
• Full-resolution data may be downloaded at no charge.

• The Tri-Decadal Global Landsat Orthorectified (previously Landsat Orthorectified) TM browse images are displayed as a 7,4,2 (RGB) color composite.
• Pixels are subsampled to a resolution of 480 meters from the original 30-meter data.
• For the full-resolution browses, the images are JPEG compressed with an average file size of 38K. For the 1000 meter display mode, the browse images are GIFs with an average file size of 23K.
• The original browse images (viewed in a separate browser window) were generated from full-resolution data that is orthorectified and UTM-projected, using the World Geodetic System 1984 datum.
• Full-resolution data may be downloaded at no charge.

• The Tri-Decadal Global Landsat Orthorectified TM Mosaic browse images are displayed as a 7,4,2 (RGB) color composite.
• Pixels are subsampled to a resolution of 700 meters from the original 30-meter data.
• The mosaics cover a 5 degree (north-south) segment of a standard 6 degree wide (east-west) UTM zone.
• The original browse images (viewed in a separate browser window) were generated from full-resolution data that is orthorectified and UTM-projected, using the World Geodetic System 1984 datum.
• Full-resolution data may be downloaded at no charge.

• The Tri-Decadal Global Landsat Orthorectified (previously Landsat Orthorectified) MSS 4-5 browse images are displayed as a 4,2,1 (RGB) color composite.
• Landsats 4-5 MSS data has sparse coverage and used only to fill in gaps in coverage for the Tri-Decadal MSS 1-3 dataset.
• Pixels are subsampled to a resolution of 480 meters from the original 80-meter data.
• For the full-resolution browses, the images are JPEG compressed with an average file size of 38K. For the 1000 meter display mode, the browse images are GIFs with an average file size of 23K.
• The original browse images (viewed in a separate browser window) were generated from full-resolution data that is orthorectified and UTM-projected, using the World Geodetic System 1984 datum.
• Full-resolution data may be downloaded at no charge.

• The Tri-Decadal Global Landsat Orthorectified (previously Landsat Orthorectified) MSS 1-3 browse images are displayed as a 7,5,4 (RGB) color composite.
• Landsats 1-3 MSS data provide worldwide historical coverage.
• Pixels are subsampled to a resolution of 480 meters from the original 80-meter data.
• For the full-resolution browses, the images are JPEG compressed with an average file size of 38K. For the 1000 meter display mode, the browse images are GIFs with an average file size of 23K.
• The original browse images (viewed in a separate browser window) were generated from full-resolution data that is orthorectified and UTM-projected, using the World Geodetic System 1984 datum.
• Full-resolution data may be downloaded at no charge.

NOTE: Because the browse images are processed from raw uncorrected data, the positional accuracy of the scenes can only be expected to be accurate within a few pixels at full resolution. These browse images are not intended for analytical use, but only as a visual scene selection aid.