{
  "accessLevel": "public",
  "bureauCode": [
    "010:12"
  ],
  "contactPoint": {
    "@type": "vcard:Contact",
    "fn": "LANDFIRE, Earth Resources Observation and Science Center (EROS), U.S. Geological Survey",
    "hasEmail": "mailto:helpdesk@landfire.gov"
  },
  "description": "LANDFIRE's (LF) 2020 Canopy Bulk Density (CBD) describes the mass of available canopy fuel per unit canopy volume that would burn in a crown fire. A spatially explicit map of CBD supplies information used in fire behavior models to determine the spread characteristics of crown fires across the landscape. The CBD mapping process derives field referenced estimates of canopy characteristics through LF Reference Database (LFRDB) plot analysis. Utilizing the LFRDB plots, field referenced CBD values are computed for each plot with the canopy fuel estimation software FuelCalc. In FuelCalc, for tree species that have no crown biomass, an equation for a species with a similar genus is used as a substitute. Species widely considered to be resistant to fire are excluded, for example, Acer and Populus spp. are excluded from the canopy fuel profile because these species are considered relatively inflammable and therefore unavailable. In LF 2020, fuel products were created with LF 2020 vegetation in non-disturbed areas. In disturbed areas, pre-disturbance vegetation was used as a starting point to derive disturbed Canopy Cover and Canopy Height from linear regression equations, which was then used to calculate CBD. \nCBD was developed using the latest Annual Disturbance products from the effective disturbance years of 2012 to 2020 to provide informed changes by disturbance type, severity, and time since disturbance (TSD). The capable fuels process calculates fuel assignments for disturbed areas using an “effective year”. This process considers all the existing disturbances included in LF 2020 and assigns fuels to the pre-disturbance vegetation based on the adjusted TSD, making the products \"2022 capable fuels\" intended for use in 2022 and accounting for two years of disturbance recovery. Learn more about LF 2020 at https://landfire.gov/data/lf2020",
  "distribution": [
    {
      "@type": "dcat:Distribution",
      "accessURL": "https://doi.org/10.5066/P1LJEZ3G",
      "description": "Landing page for access to the data",
      "format": "XML",
      "mediaType": "application/http",
      "title": "Digital Data"
    },
    {
      "@type": "dcat:Distribution",
      "description": "The metadata original format",
      "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.6a1607a5b66b013d45990bb7.xml",
      "format": "XML",
      "mediaType": "text/xml",
      "title": "Original Metadata"
    }
  ],
  "identifier": "http://datainventory.doi.gov/id/dataset/USGS_6a1607a5b66b013d45990bb7",
  "keyword": [
    "AK",
    "Alaska",
    "CBD",
    "Canopy Bulk Density",
    "LANDFIRE 2020",
    "LF 2020",
    "OCONUS",
    "U.S. Forest Service (USFS)",
    "U.S. Geological Survey (USGS)",
    "US",
    "USGS:6a1607a5b66b013d45990bb7",
    "United States",
    "biota",
    "fires",
    "geographic information systems",
    "geospatial datasets",
    "hazard preparedness",
    "image collections",
    "imageryBaseMapsEarthCover",
    "raster digital data",
    "remote sensing"
  ],
  "modified": "2026-07-23T00:00:00Z",
  "publisher": {
    "@type": "org:Organization",
    "name": "U.S. Geological Survey"
  },
  "spatial": "-179.3173, 48.8767, -122.0000, 71.5478",
  "theme": [
    "geospatial"
  ],
  "title": "LANDFIRE 2020 Forest Canopy Bulk Density (CBD) AK"
}