Landsat Missions
Band-specific gap mask files are included with every Scan Line Corrector (SLC)-off standard data product. These ancillary data allow users 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.
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Figure 1. Sample SLC-Off to SLC-On gap mask |
Gap Mask Legend Values:
For a standard SLC-off product, the data values contained within the gap mask file are as listed below.
| Value | Meaning |
|---|---|
| 0 | No data (data were missing in the original SLC-off scene) |
| 1 | Populated data (data were present in the original SLC-off scene) |
Gap mask files may not be included in older SLC-off scenes that have not been recently processed. You can create gap mask file by reviewing the information provided on http://landsat.usgs.gov/gap_mask_files_are_not_provided_can_I_create_my_own.php
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://landsat.usgs.gov
Page Contact Information: Ask Landsat
Page Last Modified: 08/29/11 02:25 pm
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