LANDFIRE's (LF) National Vegetation Classification (NVC), an existing vegetation layer created with a new mapping process and delivered as a separate spatial data layer for the first time with LF Remap, represents the current distribution of vegetation groups within the U.S. National Vegetation Classification circa 2016. These groups are defined as combinations of relatively narrow sets of diagnostic plant species, including dominants and co-dominants, broadly similar composition, and diagnostic growth forms. LF Remap used U.S. NVC 2.0 to map LF NVC.
The LF NVC product also includes ruderal or semi-natural vegetation types. The LF Ruderal NVC Groups Descriptions for CONUS provides descriptions for each ruderal NVC Group including species, distribution, and classification information.
NVC groups were initially mapped using decision tree models informed by field reference data, Landsat imagery, elevation/topographic, and biophysical gradient inputs.
LF Remap Auto-Keys: Learn about the redesign of the Auto-Keys process, which is used to determine existing vegetation type classification based on plot data in the LFRDB — Developing Auto-Keys for LF Vegetation Mapping: 2014-2015 CONUS Project Report.
LF uses an assessment process that compares the EVT product for a pixel with the Auto-Key EVT assignment for a sample plot contained in that pixel. NVC is part of the assessment. Agreement assessments have has been developed for each LF Remap CONUS GeoArea
The raster attribute table is included in the LF product download in a database file (DBF) format.
(Why is the DBF important?)
Comma separated value (CSV) files can be found in the LF Library.