USDA Forest Service

Geospatial Technology And Applications Center

Unmappable

As used in RAVG products, any pixels/acreage that are masked because of any condition in the pre- or post-fire imagery that would prevent a valid vegetation condition assessment. They include clouds, cloud shadows, active fire, smoke, snow, and open water. Data gaps in Landsat 7 imagery caused by the failure of the scan-line corrector are also routinely masked.

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