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Vegetation Departure

Maps available to view and download ››

Vegetation Departure (VDEP) indicates how different current vegetation on a landscape is from estimated historical conditions. VDEP is based on changes to species composition, structural stage, and canopy closure using methods originally described in the Interagency Fire Regime Condition Class Guidebook, but is not identical to those methods. LANDFIRE (LF) VDEP is based only on departure of current vegetation conditions from reference vegetation conditions, whereas the Guidebook approach includes departure of current fire regimes from those of the reference period.

VDEP is a landscape metric and is scale dependent. Every pixel in a unique biophysical settings (BpS) in a summary unit has the same VDEP value. These large landscape values may not represent smaller areas within a summary unit.

The VDEP metric ranges from 0 - 100, and is based on four factors. These inputs are held constant within a single version of LF, but can be different across LF versions, which directly impacts VDEP comparability across versions. VDEP can be compared across versions but caution is advised.

VDEP Factors

• LF Mapped Current Conditions (Sclass)
• Estimated Reference Conditions
• Included Types
• Landscape Summary Unit

Refer to Succession Class (SCLASS), VDEP and VCC metadata in each LF version for more information.

LF_1.0.0 (National) VCC Documentation
Attribute Data Dictionary
CSV (Why is the CSV important?)

Attribute Tables

Attribute tables for LF grid data, served in CSV (comma separated values) file format, are available on the Data Distribution Site and landfire.gov. Generally, these attribute tables provide information pertaining to the grid class value along with class descriptions or labels for these values. Attribute tables, such as the Existing Vegetation Type, provide additional attribute fields that can provide crosswalk links to other classification themes. Color mapping fields are also provided within the attribute tables, providing a standardized, consistent LF color mapping schema for these data layers. The attribute files are in comma separated value (csv) format that can be easily converted to other formats to meet user needs.

The attribute tables are provided as a convenience as calculations with grid data will automatically drop attributes. For example, if a grid is clipped, the rowid, value, and count are the only attributes retained. Attribute fields can be reattached to the grid using a join attribute function having the "value" attribute as the link.

Metadata:

• CONUS (LF 1.3.0)
• AK (LF 1.1.0)
• HI (LF 1.1.0)

Data Distribution Site