Landfire Forest Canopy Cover (Alaska) (Image Service)

Metadata Updated: December 3, 2020

The LANDFIRE fuel data describe the composition and characteristics of both surface fuel and canopy fuel. Specific products include fire behavior fuel models, canopy bulk density (CBD), canopy base height (CBH), canopy cover (CC), canopy height (CH), and fuel loading models (FLMs). These data may be implemented within models to predict the behavior and effects of wildland fire. These data are useful for strategic fuel treatment prioritization and tactical assessment of fire behavior and effects. DATA SUMMARY: Canopy cover (CC) describes percent cover of tree canopy in a stand. A spatially-explicit map of canopy cover supplies information for fire behavior models such as FARSITE (Finney 1998) to determine surface fuel shading for calculating dead fuel moisture and for calculating wind reductions. In FARSITE, canopy characteristics are used to compute shading, wind reduction factors, spotting distances, crown fuel volume, spread characteristics of crown fires and incorporate the effects of ladder fuels for transitions from a surface to crown fire. Canopy characteristics refer to the tree canopy. Where there are tree canopies, i.e. existing vegetation types that are forest and woodland, LANDFIRE has attributed the grid with canopy characteristics with some exceptions. There will be no canopy characteristics in fuel types where the tree canopy is considered a part of the surface fuel and the surface fire behavior fuel model is chosen as such. This is because LANDFIRE assumes the potential burnable biomass in the tree canopy has been accounted for in the surface fuel model parameters. For example, young or short conifer stands where the trees are represented by a shrub type fuel model will not have canopy characteristics. CC is derived from Existing Vegetation Cover (EVC) using the Landfire Total Fuel Change (LFTFC) ArcGIS toolbar. Forested EVC values are reclassified from the nine Landfire EVC codes to represent the midpoint of the classification. CC values are represented in 10 percent increments starting with fifteen and ending at ninety five. Where EVC is not forested or the tree cover is considered to be part of the surface fuel CC receives a value of 0 percent. Certain types of agriculture that a deemed burnable get a value added by LFTFC based on region and type of vegetation. Field plot data contributed either directly or indirectly to this LANDFIRE National data product. Go to https://landfire.gov/participate_refdata_sub.php for more information regarding contributors of field plot data. LANDFIRE 2014 (lf_1.4.0) used LANDFIRE 2012 (lf_1.3.0) data as a launching point to incorporate disturbance and its severity, both managed and natural, which occurred on the landscape after 2012. Specific examples of disturbance are: fire, vegetation management, wind, and insect and disease. Disturbance data used in the updating is 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 events data call. Vegetation growth was modeled where disturbance occurred. Metadata and Downloads

Access & Use Information

Public: This dataset is intended for public access and use. License: See this page for license information.

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Dates

Metadata Created Date December 3, 2020
Metadata Updated Date December 3, 2020

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date December 3, 2020
Metadata Updated Date December 3, 2020
Publisher U.S. Forest Service
Unique Identifier Unknown
Maintainer
Identifier https://data-usfs.hub.arcgis.com/datasets/6156defa0c034119bb8ecd5cc405fbe9
Data First Published 2019-08-09
Data Last Modified 2020-06-11
Category geospatial
Public Access Level public
Bureau Code 005:96
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Homepage URL https://data-usfs.hub.arcgis.com/datasets/6156defa0c034119bb8ecd5cc405fbe9
License https://data-usfs.hub.arcgis.com/datasets/6156defa0c034119bb8ecd5cc405fbe9/license.json
Metadata Type geospatial
Program Code 005:059
Source Datajson Identifier True
Source Hash c207cb5f9f2a84bb4bca4b5e931177374425b290
Source Schema Version 1.1
Spatial 175.5077,49.0571,-117.2913,67.6013

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