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Data Products ›› LANDFIRE Fire Regime Product Descriptions Vegetation Condition Class
LF_1.1.0 (Refresh 2008) – LF_1.1.0 used LF_1.0.5 (Refresh 2001) data as a launching point to incorporate disturbance and its severity, both managed and natural, which occurred on the landscape after 2001. Specific examples of disturbance are: fire, vegetation management, weather, and insect and disease. The final disturbance data used in LF_1.1.0 are the result of several efforts that include data derived in part from remotely sensed land change methods, Monitoring Trends in Burn Severity (MTBS), and the LANDFIRE Refresh events data call. Vegetation growth was modeled where both disturbance and non-disturbance occurred. LF_1.0.5 (Refresh 2001) – Imagery used in LF_1.0.0 (LANDFIRE National) covered a span of years, and because of this, several large wildland fires are not represented in the data. LF_1.0.5 data ensure wildland fires through 2001 are represented. Additional improvements found in LF_1.0.5 data products include resolving inconsistencies along the international borders and updating aspects of the following: riparian and wetlands areas, agricultural and urban vegetation types as burnable, and adjusting the extent of barren and water land cover types. LF_1.0.0 (National) – VCC was calculated based on changes to species composition, structural stage, and canopy closure and used methods derived from the Interagency Fire Regime Condition Class Guidebook (Barrett and others 2010); Holsinger and others 2006). For a more detailed technical description, read Developing the LANDFIRE Fire Regime Data Products (Rollins and others 2007). The VCC layer represents the departure of current vegetation conditions from simulated historical reference conditions, which is only one component of the VCC characterization outlined in Barrett and others (2010). LANDFIRE simulates historical vegetation reference conditions using the vegetation and disturbance dynamics model LANDSUM (Keane and others 2002; Keane and others 2006; Pratt and others 2006). Current vegetation conditions are derived from a classification of existing vegetation type, cover, and height. LF_0.5.0 (Rapid Assessment) – FRCC was calculated for each LF_0.5.0 potential natural vegetation group (PNVG) within an ECOMAP subsection using standard Interagency Fire Regime Condition Class Guidebook methods (Barrett and others 2010). Reference conditions were estimated through the LF_0.5.0 PNVG modeling effort (for more information, please visit the LF_0.5.0 Reference Condition Models section of this website). Current conditions were estimated as part of the LF_0.5.0 Succession Classes spatial data layer. For additional information on the methods used to calculate FRCC, please visit www.frcc.gov.
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