LANDFIRE 2001 Refresh Succession Classes (SClass) CONUS

LANDFIRE (LF) 2001 Succession Classes (SClass) categorize current vegetation composition and structure into up to five successional states defined for each LF Biophysical Settings (BpS) Model. An additional category defines uncharacteristic vegetation components that are not found within the compositional or structural variability of successional states defined for each BpS model, such as exotic species. These succession classes are similar in concept to those defined in the Interagency Fire Regime Condition Class Guidebook.
Five successional classes, A (1) - E (5) define successional states represented within a given BpS model. UN (6) represents uncharacteristic native vegetation for the BpS model on which these vegetation conditions are found. These are taken to represent vegetation cover, height, or composition that would not have been expected to occur on the BpS during the reference condition period. UE (7) represents uncharacteristic exotic vegetation for the BpS model on which these vegetation conditions are found. Additional values were included to represent Water (111), Snow / Ice (112), Barren (131), and Sparsely Vegetated (132). Urban (120) and Agriculture (180) are provided to mask out such areas from analysis of vegetation departure.