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Q. Why did the layer name change from FRCC to VCC?
LANDFIRE (LF) never delivered "full" Fire Regime Condition Class (FRCC) even when the product carried that name, so it was renamed to reduce confusion.
FRCC is composed of two elements: Vegetation Departure and Fire Regime Departure. LF produced and delivered the first component of FRCC (Vegetation Departure) because LF had no consistent way to estimate Fire Regime Departure over the entire geography. Therefore, the product was renamed Vegetation Condition Class (VCC) since it is a more appropriate and descriptive name. VCC is Vegetation Departure sliced into categories.